Documentation: add TLS offload documentation

Describe existing kernel TLS offload (added back in Linux 4.19) -
the mechanism, the expected behavior and the notable corner cases.

This documentation is mostly targeting hardware vendors who want
to implement offload, to ensure consistency between implementations.

v2:
- add emphasis around TLS_SW/TLS_HW/TLS_HW_RECORD;
- remove mentions of ongoing work (Boris);
- split the flow of data in SW vs. HW cases in TX overview
(Boris);
- call out which fields are updated by the device and which
are filled by the stack (Boris);
- move error handling into it's own section (Boris);
- add more words about fallback (Boris);
- note that checksum validation is required (Alexei);
- note that drivers shouldn't pay attention to the TLS
device features.

Signed-off-by: Jakub Kicinski <[e-mail]>
Acked-by: Dave Watson <[e-mail]>
Acked-by: Alexei Starovoitov <[e-mail]>
Acked-by: Boris Pismenny <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

Documentation/networking/index.rst

···
    segmentation-offloads
    scaling
    tls
+   tls-offload
 
 .. only::  subproject
 

Documentation/networking/tls-offload-layers.svg

···
+<svg version="1.1" viewBox="0.0 0.0 460.0 500.0" fill="none" stroke="none" stroke-linecap="square" stroke-miterlimit="10" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><clipPath id="p.0"><path d="m0 0l960.0 0l0 720.0l-960.0 0l0 -720.0z" clip-rule="nonzero"/></clipPath><g clip-path="url(#p.0)"><path fill="#000000" fill-opacity="0.0" d="m0 0l960.0 0l0 720.0l-960.0 0z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m117.02887 0l72.28346 0l0 40.25197l-72.28346 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m117.02887 0l72.28346 0l0 40.25197l-72.28346 0z" fill-rule="evenodd"/><path fill="#000000" d="m135.71944 27.045982l0 -9.671875l1.46875 0l0 1.46875q0.5625 -1.03125 1.03125 -1.359375q0.484375 -0.328125 1.0625 -0.328125q0.828125 0 1.6875 0.53125l-0.5625 1.515625q-0.609375 -0.359375 -1.203125 -0.359375q-0.546875 0 -0.96875 0.328125q-0.421875 0.328125 -0.609375 0.890625q-0.28125 0.875 -0.28125 1.921875l0 5.0625l-1.625 0zm12.853302 -3.109375l1.6875 0.203125q-0.40625 1.484375 -1.484375 2.3125q-1.078125 0.8125 -2.765625 0.8125q-2.125 0 -3.375 -1.296875q-1.234375 -1.3125 -1.234375 -3.671875q0 -2.453125 1.25 -3.796875q1.265625 -1.34375 3.265625 -1.34375q1.9375 0 3.15625 1.328125q1.234375 1.3125 1.234375 3.703125q0 0.15625 0 0.4375l-7.21875 0q0.09375 1.59375 0.90625 2.453125q0.8125 0.84375 2.015625 0.84375q0.90625 0 1.546875 -0.46875q0.640625 -0.484375 1.015625 -1.515625zm-5.390625 -2.65625l5.40625 0q-0.109375 -1.21875 -0.625 -1.828125q-0.78125 -0.953125 -2.03125 -0.953125q-1.125 0 -1.90625 0.765625q-0.765625 0.75 -0.84375 2.015625zm15.453842 4.578125q-0.921875 0.765625 -1.765625 1.09375q-0.828125 0.3125 -1.796875 0.3125q-1.59375 0 -2.453125 -0.78125q-0.859375 -0.78125 -0.859375 -1.984375q0 -0.71875 0.328125 -1.296875q0.328125 -0.59375 0.84375 -0.9375q0.53125 -0.359375 1.1875 -0.546875q0.46875 -0.125 1.453125 -0.25q1.984375 -0.234375 2.921875 -0.5625q0.015625 -0.34375 0.015625 -0.421875q0 -1.0 -0.46875 -1.421875q-0.625 -0.546875 -1.875 -0.546875q-1.15625 0 -1.703125 0.40625q-0.546875 0.40625 -0.8125 1.421875l-1.609375 -0.21875q0.21875 -1.015625 0.71875 -1.640625q0.5 -0.640625 1.453125 -0.984375q0.953125 -0.34375 2.1875 -0.34375q1.25 0 2.015625 0.296875q0.78125 0.28125 1.140625 0.734375q0.375 0.4375 0.515625 1.109375q0.078125 0.421875 0.078125 1.515625l0 2.1875q0 2.28125 0.109375 2.890625q0.109375 0.59375 0.40625 1.15625l-1.703125 0q-0.265625 -0.515625 -0.328125 -1.1875zm-0.140625 -3.671875q-0.890625 0.375 -2.671875 0.625q-1.015625 0.140625 -1.4375 0.328125q-0.421875 0.1875 -0.65625 0.53125q-0.21875 0.34375 -0.21875 0.78125q0 0.65625 0.5 1.09375q0.5 0.4375 1.453125 0.4375q0.9375 0 1.671875 -0.40625q0.75 -0.421875 1.09375 -1.140625q0.265625 -0.5625 0.265625 -1.640625l0 -0.609375zm10.469467 4.859375l0 -1.21875q-0.90625 1.4375 -2.703125 1.4375q-1.15625 0 -2.125 -0.640625q-0.96875 -0.640625 -1.5 -1.78125q-0.53125 -1.140625 -0.53125 -2.625q0 -1.453125 0.484375 -2.625q0.484375 -1.1875 1.4375 -1.8125q0.96875 -0.625 2.171875 -0.625q0.875 0 1.546875 0.375q0.6875 0.359375 1.109375 0.953125l0 -4.796875l1.640625 0l0 13.359375l-1.53125 0zm-5.171875 -4.828125q0 1.859375 0.78125 2.78125q0.78125 0.921875 1.84375 0.921875q1.078125 0 1.828125 -0.875q0.75 -0.890625 0.75 -2.6875q0 -1.984375 -0.765625 -2.90625q-0.765625 -0.9375 -1.890625 -0.9375q-1.078125 0 -1.8125 0.890625q-0.734375 0.890625 -0.734375 2.8125z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m309.02887 0l72.28348 0l0 40.25197l-72.28348 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m309.02887 0l72.28348 0l0 40.25197l-72.28348 0z" fill-rule="evenodd"/><path fill="#000000" d="m328.4915 27.045982l-2.96875 -9.671875l1.703125 0l1.53125 5.578125l0.578125 2.078125q0.046875 -0.15625 0.5 -2.0l1.546875 -5.65625l1.6875 0l1.4375 5.609375l0.484375 1.84375l0.5625 -1.859375l1.65625 -5.59375l1.59375 0l-3.03125 9.671875l-1.703125 0l-1.53125 -5.796875l-0.375 -1.640625l-1.953125 7.4375l-1.71875 0zm11.676086 0l0 -9.671875l1.46875 0l0 1.46875q0.5625 -1.03125 1.03125 -1.359375q0.484375 -0.328125 1.0625 -0.328125q0.828125 0 1.6875 0.53125l-0.5625 1.515625q-0.609375 -0.359375 -1.203125 -0.359375q-0.546875 0 -0.96875 0.328125q-0.421875 0.328125 -0.609375 0.890625q-0.28125 0.875 -0.28125 1.921875l0 5.0625l-1.625 0zm6.228302 -11.46875l0 -1.890625l1.640625 0l0 1.890625l-1.640625 0zm0 11.46875l0 -9.671875l1.640625 0l0 9.671875l-1.640625 0zm7.722931 -1.46875l0.234375 1.453125q-0.6875 0.140625 -1.234375 0.140625q-0.890625 0 -1.390625 -0.28125q-0.484375 -0.28125 -0.6875 -0.734375q-0.203125 -0.46875 -0.203125 -1.9375l0 -5.578125l-1.203125 0l0 -1.265625l1.203125 0l0 -2.390625l1.625 -0.984375l0 3.375l1.65625 0l0 1.265625l-1.65625 0l0 5.671875q0 0.6875 0.078125 0.890625q0.09375 0.203125 0.28125 0.328125q0.203125 0.109375 0.578125 0.109375q0.265625 0 0.71875 -0.0625zm8.230194 -1.640625l1.6875 0.203125q-0.40625 1.484375 -1.484375 2.3125q-1.078125 0.8125 -2.765625 0.8125q-2.125 0 -3.375 -1.296875q-1.234375 -1.3125 -1.234375 -3.671875q0 -2.453125 1.25 -3.796875q1.265625 -1.34375 3.265625 -1.34375q1.9375 0 3.15625 1.328125q1.234375 1.3125 1.234375 3.703125q0 0.15625 0 0.4375l-7.21875 0q0.09375 1.59375 0.90625 2.453125q0.8125 0.84375 2.015625 0.84375q0.90625 0 1.546875 -0.46875q0.640625 -0.484375 1.015625 -1.515625zm-5.390625 -2.65625l5.40625 0q-0.109375 -1.21875 -0.625 -1.828125q-0.78125 -0.953125 -2.03125 -0.953125q-1.125 0 -1.90625 0.765625q-0.765625 0.75 -0.84375 2.015625z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m73.64304 101.46588l351.0551 0l0 53.70079l-351.0551 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m73.64304 101.46588l351.0551 0l0 53.70079l-351.0551 0z" fill-rule="evenodd"/><path fill="#000000" d="m215.67503 135.23627l0 -13.359367l1.640625 0l0 7.6249924l3.890625 -3.9374924l2.109375 0l-3.6875 3.5937424l4.0625 6.078125l-2.015625 0l-3.203125 -4.953125l-1.15625 1.125l0 3.828125l-1.640625 0zm12.90625 -1.46875l0.234375 1.453125q-0.6875 0.140625 -1.234375 0.140625q-0.890625 0 -1.390625 -0.28125q-0.484375 -0.28125 -0.6875 -0.734375q-0.203125 -0.46875 -0.203125 -1.9375l0 -5.5781174l-1.203125 0l0 -1.265625l1.203125 0l0 -2.390625l1.625 -0.984375l0 3.375l1.65625 0l0 1.265625l-1.65625 0l0 5.6718674q0 0.6875 0.078125 0.890625q0.09375 0.203125 0.28125 0.328125q0.203125 0.109375 0.578125 0.109375q0.265625 0 0.71875 -0.0625zm1.5583038 1.46875l0 -13.359367l1.640625 0l0 13.359367l-1.640625 0zm3.5354462 -2.890625l1.625 -0.25q0.125 0.96875 0.75 1.5q0.625 0.515625 1.75 0.515625q1.125 0 1.671875 -0.453125q0.546875 -0.46875 0.546875 -1.09375q0 -0.546875 -0.484375 -0.875q-0.328125 -0.21875 -1.671875 -0.546875q-1.8125 -0.46875 -2.515625 -0.796875q-0.6875 -0.328125 -1.046875 -0.90625q-0.359375 -0.59375 -0.359375 -1.3125q0 -0.6406174 0.296875 -1.1874924q0.296875 -0.5625 0.8125 -0.921875q0.375 -0.28125 1.03125 -0.46875q0.671875 -0.203125 1.421875 -0.203125q1.140625 0 2.0 0.328125q0.859375 0.328125 1.265625 0.890625q0.421875 0.5625 0.578125 1.4999924l-1.609375 0.21875q-0.109375 -0.7499924 -0.640625 -1.1718674q-0.515625 -0.421875 -1.46875 -0.421875q-1.140625 0 -1.625 0.375q-0.46875 0.375 -0.46875 0.875q0 0.31249237 0.1875 0.5781174q0.203125 0.265625 0.640625 0.4375q0.234375 0.09375 1.4375 0.421875q1.75 0.453125 2.4375 0.75q0.6875 0.296875 1.078125 0.859375q0.390625 0.5625 0.390625 1.40625q0 0.828125 -0.484375 1.546875q-0.46875 0.71875 -1.375 1.125q-0.90625 0.390625 -2.046875 0.390625q-1.875 0 -2.875 -0.78125q-0.984375 -0.78125 -1.25 -2.328125zm24.136429 -10.468742l1.765625 0l0 7.7187424q0 2.015625 -0.453125 3.203125q-0.453125 1.1875 -1.640625 1.9375q-1.1875 0.734375 -3.125 0.734375q-1.875 0 -3.078125 -0.640625q-1.1875 -0.65625 -1.703125 -1.875q-0.5 -1.234375 -0.5 -3.359375l0 -7.7187424l1.765625 0l0 7.7187424q0 1.734375 0.3125 2.5625q0.328125 0.8125 1.109375 1.265625q0.796875 0.453125 1.9375 0.453125q1.953125 0 2.78125 -0.890625q0.828125 -0.890625 0.828125 -3.390625l0 -7.7187424zm4.629181 13.359367l0 -13.359367l1.78125 0l0 11.781242l6.5625 0l0 1.578125l-8.34375 0zm10.453857 0l0 -13.359367l5.046875 0q1.328125 0 2.03125 0.125q0.96875 0.171875 1.640625 0.640625q0.671875 0.453125 1.078125 1.28125q0.40625 0.828125 0.40625 1.828125q0 1.703125 -1.09375 2.8906174q-1.078125 1.171875 -3.921875 1.171875l-3.421875 0l0 5.421875l-1.765625 0zm1.765625 -7.0l3.453125 0q1.71875 0 2.4375 -0.6406174q0.71875 -0.640625 0.71875 -1.796875q0 -0.84375 -0.421875 -1.4375q-0.421875 -0.59375 -1.125 -0.78125q-0.4375 -0.125 -1.640625 -0.125l-3.421875 0l0 4.7812424z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m73.64304 216.38058l351.0551 0l0 53.700775l-351.0551 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m73.64304 216.38058l351.0551 0l0 53.700775l-351.0551 0z" fill-rule="evenodd"/><path fill="#000000" d="m211.16338 250.15097l0 -11.78125l-4.40625 0l0 -1.578125l10.578125 0l0 1.578125l-4.40625 0l0 11.78125l-1.765625 0zm17.52098 -4.6875l1.765625 0.453125q-0.5625 2.171875 -2.0 3.328125q-1.4375 1.140625 -3.53125 1.140625q-2.15625 0 -3.515625 -0.875q-1.34375 -0.890625 -2.0625 -2.546875q-0.703125 -1.671875 -0.703125 -3.59375q0 -2.078125 0.796875 -3.625q0.796875 -1.5625 2.265625 -2.359375q1.484375 -0.8125 3.25 -0.8125q2.0 0 3.359375 1.015625q1.375 1.015625 1.90625 2.875l-1.734375 0.40625q-0.46875 -1.453125 -1.359375 -2.109375q-0.875 -0.671875 -2.203125 -0.671875q-1.546875 0 -2.578125 0.734375q-1.03125 0.734375 -1.453125 1.984375q-0.421875 1.234375 -0.421875 2.5625q0 1.703125 0.5 2.96875q0.5 1.265625 1.546875 1.90625q1.046875 0.625 2.265625 0.625q1.484375 0 2.515625 -0.859375q1.03125 -0.859375 1.390625 -2.546875zm3.9416962 4.6875l0 -13.359375l5.046875 0q1.328125 0 2.03125 0.125q0.96875 0.171875 1.640625 0.640625q0.671875 0.453125 1.078125 1.28125q0.40625 0.828125 0.40625 1.828125q0 1.703125 -1.09375 2.890625q-1.078125 1.171875 -3.921875 1.171875l-3.421875 0l0 5.421875l-1.765625 0zm1.765625 -7.0l3.453125 0q1.71875 0 2.4375 -0.640625q0.71875 -0.640625 0.71875 -1.796875q0 -0.84375 -0.421875 -1.4375q-0.421875 -0.59375 -1.125 -0.78125q-0.4375 -0.125 -1.640625 -0.125l-3.421875 0l0 4.78125zm14.664642 4.109375l1.625 -0.25q0.125 0.96875 0.75 1.5q0.625 0.515625 1.75 0.515625q1.125 0 1.671875 -0.453125q0.546875 -0.46875 0.546875 -1.09375q0 -0.546875 -0.484375 -0.875q-0.328125 -0.21875 -1.671875 -0.546875q-1.8125 -0.46875 -2.515625 -0.796875q-0.6875 -0.328125 -1.046875 -0.90625q-0.359375 -0.59375 -0.359375 -1.3125q0 -0.640625 0.296875 -1.1875q0.296875 -0.5625 0.8125 -0.921875q0.375 -0.28125 1.03125 -0.46875q0.671875 -0.203125 1.421875 -0.203125q1.140625 0 2.0 0.328125q0.859375 0.328125 1.2656097 0.890625q0.421875 0.5625 0.578125 1.5l-1.6093597 0.21875q-0.109375 -0.75 -0.640625 -1.171875q-0.515625 -0.421875 -1.46875 -0.421875q-1.140625 0 -1.625 0.375q-0.46875 0.375 -0.46875 0.875q0 0.3125 0.1875 0.578125q0.203125 0.265625 0.640625 0.4375q0.234375 0.09375 1.4375 0.421875q1.75 0.453125 2.4375 0.75q0.68748474 0.296875 1.0781097 0.859375q0.390625 0.5625 0.390625 1.40625q0 0.828125 -0.484375 1.546875q-0.46875 0.71875 -1.3749847 1.125q-0.90625 0.390625 -2.046875 0.390625q-1.875 0 -2.875 -0.78125q-0.984375 -0.78125 -1.25 -2.328125zm13.562485 1.421875l0.234375 1.453125q-0.6875 0.140625 -1.234375 0.140625q-0.890625 0 -1.390625 -0.28125q-0.484375 -0.28125 -0.6875 -0.734375q-0.203125 -0.46875 -0.203125 -1.9375l0 -5.578125l-1.203125 0l0 -1.265625l1.203125 0l0 -2.390625l1.625 -0.984375l0 3.375l1.65625 0l0 1.265625l-1.65625 0l0 5.671875q0 0.6875 0.078125 0.890625q0.09375 0.203125 0.28125 0.328125q0.203125 0.109375 0.578125 0.109375q0.265625 0 0.71875 -0.0625zm7.917694 0.28125q-0.921875 0.765625 -1.765625 1.09375q-0.828125 0.3125 -1.796875 0.3125q-1.59375 0 -2.453125 -0.78125q-0.859375 -0.78125 -0.859375 -1.984375q0 -0.71875 0.328125 -1.296875q0.328125 -0.59375 0.84375 -0.9375q0.53125 -0.359375 1.1875 -0.546875q0.46875 -0.125 1.453125 -0.25q1.984375 -0.234375 2.921875 -0.5625q0.015625 -0.34375 0.015625 -0.421875q0 -1.0 -0.46875 -1.421875q-0.625 -0.546875 -1.875 -0.546875q-1.15625 0 -1.703125 0.40625q-0.546875 0.40625 -0.8125 1.421875l-1.609375 -0.21875q0.21875 -1.015625 0.71875 -1.640625q0.5 -0.640625 1.453125 -0.984375q0.953125 -0.34375 2.1875 -0.34375q1.25 0 2.015625 0.296875q0.78125 0.28125 1.140625 0.734375q0.375 0.4375 0.515625 1.109375q0.078125 0.421875 0.078125 1.515625l0 2.1875q0 2.28125 0.109375 2.890625q0.109375 0.59375 0.40625 1.15625l-1.703125 0q-0.265625 -0.515625 -0.328125 -1.1875zm-0.140625 -3.671875q-0.890625 0.375 -2.671875 0.625q-1.015625 0.140625 -1.4375 0.328125q-0.421875 0.1875 -0.65625 0.53125q-0.21875 0.34375 -0.21875 0.78125q0 0.65625 0.5 1.09375q0.5 0.4375 1.453125 0.4375q0.9375 0 1.671875 -0.40625q0.75 -0.421875 1.09375 -1.140625q0.265625 -0.5625 0.265625 -1.640625l0 -0.609375zm10.516327 1.3125l1.609375 0.21875q-0.265625 1.65625 -1.359375 2.609375q-1.078125 0.9375 -2.671875 0.9375q-1.984375 0 -3.1875 -1.296875q-1.203125 -1.296875 -1.203125 -3.71875q0 -1.578125 0.515625 -2.75q0.515625 -1.171875 1.578125 -1.75q1.0625 -0.59375 2.3125 -0.59375q1.578125 0 2.578125 0.796875q1.0 0.796875 1.28125 2.265625l-1.59375 0.234375q-0.234375 -0.96875 -0.8125 -1.453125q-0.578125 -0.5 -1.390625 -0.5q-1.234375 0 -2.015625 0.890625q-0.78125 0.890625 -0.78125 2.8125q0 1.953125 0.75 2.84375q0.75 0.875 1.953125 0.875q0.96875 0 1.609375 -0.59375q0.65625 -0.59375 0.828125 -1.828125zm3.015625 3.546875l0 -13.359375l1.640625 0l0 7.625l3.890625 -3.9375l2.109375 0l-3.6875 3.59375l4.0625 6.078125l-2.015625 0l-3.203125 -4.953125l-1.15625 1.125l0 3.828125l-1.640625 0z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m73.64304 331.2953l351.0551 0l0 53.700775l-351.0551 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m73.64304 331.2953l351.0551 0l0 53.700775l-351.0551 0z" fill-rule="evenodd"/><path fill="#000000" d="m225.73463 365.06567l0 -13.359375l4.609375 0q1.546875 0 2.375 0.203125q1.140625 0.25 1.953125 0.953125q1.0625 0.890625 1.578125 2.28125q0.53125 1.390625 0.53125 3.171875q0 1.515625 -0.359375 2.703125q-0.359375 1.171875 -0.921875 1.9375q-0.546875 0.765625 -1.203125 1.21875q-0.65625 0.4375 -1.59375 0.671875q-0.9375 0.21875 -2.140625 0.21875l-4.828125 0zm1.765625 -1.578125l2.859375 0q1.3125 0 2.0625 -0.234375q0.75 -0.25 1.203125 -0.703125q0.625 -0.625 0.96875 -1.6875q0.359375 -1.0625 0.359375 -2.578125q0 -2.09375 -0.6875 -3.21875q-0.6875 -1.125 -1.671875 -1.5q-0.703125 -0.28125 -2.28125 -0.28125l-2.8125 0l0 10.203125zm11.488571 1.578125l0 -9.671875l1.46875 0l0 1.46875q0.5625 -1.03125 1.03125 -1.359375q0.484375 -0.328125 1.0625 -0.328125q0.828125 0 1.6875 0.53125l-0.5625 1.515625q-0.609375 -0.359375 -1.203125 -0.359375q-0.546875 0 -0.96875 0.328125q-0.421875 0.328125 -0.609375 0.890625q-0.28125 0.875 -0.28125 1.921875l0 5.0625l-1.625 0zm6.228302 -11.46875l0 -1.890625l1.640625 0l0 1.890625l-1.640625 0zm0 11.46875l0 -9.671875l1.640625 0l0 9.671875l-1.640625 0zm6.832321 0l-3.6875 -9.671875l1.734375 0l2.078125 5.796875q0.328125 0.9375 0.625 1.9375q0.203125 -0.765625 0.609375 -1.828125l2.140625 -5.90625l1.6874847 0l-3.6562347 9.671875l-1.53125 0zm13.26561 -3.109375l1.6875 0.203125q-0.40625 1.484375 -1.484375 2.3125q-1.078125 0.8125 -2.765625 0.8125q-2.125 0 -3.375 -1.296875q-1.234375 -1.3125 -1.234375 -3.671875q0 -2.453125 1.25 -3.796875q1.265625 -1.34375 3.265625 -1.34375q1.9375 0 3.15625 1.328125q1.234375 1.3125 1.234375 3.703125q0 0.15625 0 0.4375l-7.21875 0q0.09375 1.59375 0.90625 2.453125q0.8125 0.84375 2.015625 0.84375q0.90625 0 1.546875 -0.46875q0.640625 -0.484375 1.015625 -1.515625zm-5.390625 -2.65625l5.40625 0q-0.109375 -1.21875 -0.625 -1.828125q-0.78125 -0.953125 -2.03125 -0.953125q-1.125 0 -1.90625 0.765625q-0.765625 0.75 -0.84375 2.015625zm9.125732 5.765625l0 -9.671875l1.46875 0l0 1.46875q0.5625 -1.03125 1.03125 -1.359375q0.484375 -0.328125 1.0625 -0.328125q0.828125 0 1.6875 0.53125l-0.5625 1.515625q-0.609375 -0.359375 -1.203125 -0.359375q-0.546875 0 -0.96875 0.328125q-0.421875 0.328125 -0.609375 0.890625q-0.28125 0.875 -0.28125 1.921875l0 5.0625l-1.625 0z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m73.64304 446.20996l351.0551 0l0 53.700806l-351.0551 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m73.64304 446.20996l351.0551 0l0 53.700806l-351.0551 0z" fill-rule="evenodd"/><path fill="#000000" d="m222.09538 479.98038l0 -13.359375l4.609375 0q1.546875 0 2.375 0.203125q1.140625 0.25 1.953125 0.953125q1.0625 0.890625 1.578125 2.28125q0.53125 1.390625 0.53125 3.171875q0 1.515625 -0.359375 2.703125q-0.359375 1.171875 -0.921875 1.9375q-0.546875 0.765625 -1.203125 1.21875q-0.65625 0.4375 -1.59375 0.671875q-0.9375 0.21875 -2.140625 0.21875l-4.828125 0zm1.765625 -1.578125l2.859375 0q1.3125 0 2.0625 -0.234375q0.75 -0.25 1.203125 -0.703125q0.625 -0.625 0.96875 -1.6875q0.359375 -1.0625 0.359375 -2.578125q0 -2.09375 -0.6875 -3.21875q-0.6875 -1.125 -1.671875 -1.5q-0.703125 -0.28125 -2.28125 -0.28125l-2.8125 0l0 10.203125zm18.129196 -1.53125l1.6875 0.203125q-0.40625 1.484375 -1.484375 2.3125q-1.078125 0.8125 -2.765625 0.8125q-2.125 0 -3.375 -1.296875q-1.234375 -1.3125 -1.234375 -3.671875q0 -2.453125 1.25 -3.796875q1.265625 -1.34375 3.265625 -1.34375q1.9375 0 3.15625 1.328125q1.234375 1.3125 1.234375 3.703125q0 0.15625 0 0.4375l-7.21875 0q0.09375 1.59375 0.90625 2.453125q0.8125 0.84375 2.015625 0.84375q0.90625 0 1.546875 -0.46875q0.640625 -0.484375 1.015625 -1.515625zm-5.390625 -2.65625l5.40625 0q-0.109375 -1.21875 -0.625 -1.828125q-0.78125 -0.953125 -2.03125 -0.953125q-1.125 0 -1.90625 0.765625q-0.765625 0.75 -0.84375 2.015625zm11.828842 5.765625l-3.6875 -9.671875l1.734375 0l2.078125 5.796875q0.328125 0.9375 0.625 1.9375q0.203125 -0.765625 0.609375 -1.828125l2.140625 -5.90625l1.6875 0l-3.65625 9.671875l-1.53125 0zm6.640625 -11.46875l0 -1.890625l1.6406097 0l0 1.890625l-1.6406097 0zm0 11.46875l0 -9.671875l1.6406097 0l0 9.671875l-1.6406097 0zm10.457321 -3.546875l1.609375 0.21875q-0.265625 1.65625 -1.359375 2.609375q-1.078125 0.9375 -2.671875 0.9375q-1.984375 0 -3.1875 -1.296875q-1.203125 -1.296875 -1.203125 -3.71875q0 -1.578125 0.515625 -2.75q0.515625 -1.171875 1.578125 -1.75q1.0625 -0.59375 2.3125 -0.59375q1.578125 0 2.578125 0.796875q1.0 0.796875 1.28125 2.265625l-1.59375 0.234375q-0.234375 -0.96875 -0.8125 -1.453125q-0.578125 -0.5 -1.390625 -0.5q-1.234375 0 -2.015625 0.890625q-0.78125 0.890625 -0.78125 2.8125q0 1.953125 0.75 2.84375q0.75 0.875 1.953125 0.875q0.96875 0 1.609375 -0.59375q0.65625 -0.59375 0.828125 -1.828125zm9.640625 0.4375l1.6875 0.203125q-0.40625 1.484375 -1.484375 2.3125q-1.078125 0.8125 -2.765625 0.8125q-2.125 0 -3.375 -1.296875q-1.234375 -1.3125 -1.234375 -3.671875q0 -2.453125 1.25 -3.796875q1.265625 -1.34375 3.265625 -1.34375q1.9375 0 3.15625 1.328125q1.234375 1.3125 1.234375 3.703125q0 0.15625 0 0.4375l-7.21875 0q0.09375 1.59375 0.90625 2.453125q0.8125 0.84375 2.015625 0.84375q0.90625 0 1.546875 -0.46875q0.640625 -0.484375 1.015625 -1.515625zm-5.390625 -2.65625l5.40625 0q-0.109375 -1.21875 -0.625 -1.828125q-0.78125 -0.953125 -2.03125 -0.953125q-1.125 0 -1.90625 0.765625q-0.765625 0.75 -0.84375 2.015625z" fill-rule="nonzero"/><path fill="#000000" fill-opacity="0.0" d="m153.17061 40.25197l0 0" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m153.17061 40.25197l0 0" fill-rule="evenodd"/><path fill="#000000" fill-opacity="0.0" d="m48.435696 73.03937l402.67715 0" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" stroke-dasharray="4.0,3.0" d="m48.435696 73.03937l402.67715 0" fill-rule="evenodd"/><path fill="#cfe2f3" d="m177.95801 71.49061l-12.393707 0l0 12.897636l-24.7874 0l0 -12.897636l-12.393692 0l24.7874 -12.89764z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m177.95801 71.49061l-12.393707 0l0 12.897636l-24.7874 0l0 -12.897636l-12.393692 0l24.7874 -12.89764z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m320.3832 71.49061l12.393707 0l0 -12.89764l24.787384 0l0 12.89764l12.393707 0l-24.787415 12.897636z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m320.3832 71.49061l12.393707 0l0 -12.89764l24.787384 0l0 12.89764l12.393707 0l-24.787415 12.897636z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m177.95801 188.3931l-12.393707 0l0 12.897629l-24.7874 0l0 -12.897629l-12.393692 0l24.7874 -12.897644z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m177.95801 188.3931l-12.393707 0l0 12.897629l-24.7874 0l0 -12.897629l-12.393692 0l24.7874 -12.897644z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m320.3832 188.3931l12.393707 0l0 -12.897644l24.787384 0l0 12.897644l12.393707 0l-24.787415 12.897629z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m320.3832 188.3931l12.393707 0l0 -12.897644l24.787384 0l0 12.897644l12.393707 0l-24.787415 12.897629z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m177.95801 301.4256l-12.393707 0l0 12.897644l-24.7874 0l0 -12.897644l-12.393692 0l24.7874 -12.897644z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m177.95801 301.4256l-12.393707 0l0 12.897644l-24.7874 0l0 -12.897644l-12.393692 0l24.7874 -12.897644z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m320.3832 301.4256l12.393707 0l0 -12.897644l24.787384 0l0 12.897644l12.393707 0l-24.787415 12.897644z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m320.3832 301.4256l12.393707 0l0 -12.897644l24.787384 0l0 12.897644l12.393707 0l-24.787415 12.897644z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m177.95801 415.4906l-12.393707 0l0 12.897644l-24.7874 0l0 -12.897644l-12.393692 0l24.7874 -12.897644z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m177.95801 415.4906l-12.393707 0l0 12.897644l-24.7874 0l0 -12.897644l-12.393692 0l24.7874 -12.897644z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m320.3832 415.4906l12.393707 0l0 -12.897644l24.787384 0l0 12.897644l12.393707 0l-24.787415 12.897644z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m320.3832 415.4906l12.393707 0l0 -12.897644l24.787384 0l0 12.897644l12.393707 0l-24.787415 12.897644z" fill-rule="evenodd"/><path fill="#000000" fill-opacity="0.0" d="m198.14961 44.009186l109.44881 0l0 53.70079l-109.44881 0z" fill-rule="evenodd"/><path fill="#000000" d="m224.98174 70.929184l2.78125 -13.359375l1.65625 0l-1.0 4.78125q0.78125 -0.71875 1.421875 -1.015625q0.640625 -0.296875 1.328125 -0.296875q1.359375 0 2.265625 1.015625q0.90625 1.0 0.90625 2.9375q0 1.28125 -0.375 2.359375q-0.359375 1.0625 -0.890625 1.78125q-0.53125 0.71875 -1.109375 1.15625q-0.578125 0.4375 -1.1875 0.640625q-0.59375 0.21875 -1.140625 0.21875q-0.96875 0 -1.703125 -0.5q-0.71875 -0.515625 -1.125 -1.546875l-0.390625 1.828125l-1.4375 0zm2.4375 -3.96875l-0.015625 0.3125q0 1.234375 0.59375 1.890625q0.59375 0.640625 1.484375 0.640625q0.859375 0 1.578125 -0.609375q0.734375 -0.609375 1.1875 -1.890625q0.46875 -1.28125 0.46875 -2.375q0 -1.21875 -0.59375 -1.890625q-0.578125 -0.671875 -1.4375 -0.671875q-0.90625 0 -1.65625 0.6875q-0.734375 0.6875 -1.234375 2.125q-0.375 1.0625 -0.375 1.78125zm14.531967 2.21875q-1.734375 1.96875 -3.5625 1.96875q-1.109375 0 -1.796875 -0.640625q-0.6875 -0.640625 -0.6875 -1.578125q0 -0.609375 0.296875 -2.09375l1.171875 -5.578125l1.65625 0l-1.296875 6.1875q-0.171875 0.765625 -0.171875 1.203125q0 0.546875 0.328125 0.859375q0.34375 0.296875 0.984375 0.296875q0.703125 0 1.359375 -0.328125q0.65625 -0.34375 1.125 -0.921875q0.484375 -0.578125 0.796875 -1.359375q0.1875 -0.5 0.453125 -1.765625l0.875 -4.171875l1.65625 0l-2.03125 9.671875l-1.515625 0l0.359375 -1.75zm4.000717 1.75l1.765625 -8.40625l-1.484375 0l0.265625 -1.265625l1.484375 0l0.28125 -1.375q0.21875 -1.03125 0.4375 -1.484375q0.234375 -0.453125 0.75 -0.75q0.53125 -0.296875 1.4375 -0.296875q0.625 0 1.828125 0.265625l-0.296875 1.4375q-0.84375 -0.21875 -1.40625 -0.21875q-0.484375 0 -0.734375 0.25q-0.25 0.234375 -0.4375 1.125l-0.21875 1.046875l1.84375 0l-0.265625 1.265625l-1.84375 0l-1.75 8.40625l-1.65625 0zm5.183304 0l1.765625 -8.40625l-1.484375 0l0.265625 -1.265625l1.484375 0l0.28125 -1.375q0.21875 -1.03125 0.4375 -1.484375q0.234375 -0.453125 0.75 -0.75q0.53125 -0.296875 1.4375 -0.296875q0.625 0 1.828125 0.265625l-0.296875 1.4375q-0.84375 -0.21875 -1.40625 -0.21875q-0.484375 0 -0.734375 0.25q-0.25 0.234375 -0.4375 1.125l-0.21875 1.046875l1.84375 0l-0.265625 1.265625l-1.84375 0l-1.75 8.40625l-1.65625 0zm12.058319 -3.28125l1.609375 0.15625q-0.34375 1.1875 -1.59375 2.265625q-1.234375 1.078125 -2.96875 1.078125q-1.0625 0 -1.96875 -0.5q-0.890625 -0.5 -1.359375 -1.4375q-0.46875 -0.953125 -0.46875 -2.15625q0 -1.59375 0.734375 -3.078125q0.734375 -1.484375 1.890625 -2.203125q1.171875 -0.734375 2.53125 -0.734375q1.734375 0 2.765625 1.078125q1.03125 1.0625 1.03125 2.921875q0 0.71875 -0.125 1.46875l-7.125 0q-0.046875 0.28125 -0.046875 0.5q0 1.359375 0.625 2.078125q0.625 0.71875 1.53125 0.71875q0.84375 0 1.65625 -0.546875q0.828125 -0.5625 1.28125 -1.609375zm-4.78125 -2.40625l5.421875 0q0.015625 -0.25 0.015625 -0.359375q0 -1.234375 -0.625 -1.890625q-0.625 -0.671875 -1.59375 -0.671875q-1.0625 0 -1.9375 0.734375q-0.859375 0.71875 -1.28125 2.1875zm8.063202 5.6875l2.015625 -9.671875l1.453125 0l-0.40625 1.96875q0.75 -1.109375 1.453125 -1.640625q0.71875 -0.546875 1.46875 -0.546875q0.5 0 1.21875 0.359375l-0.671875 1.53125q-0.4375 -0.3125 -0.9375 -0.3125q-0.875 0 -1.78125 0.96875q-0.90625 0.953125 -1.4375 3.46875l-0.8125 3.875l-1.5625 0zm6.368927 -3.3125l1.640625 -0.09375q0 0.703125 0.21875 1.21875q0.21875 0.5 0.796875 0.8125q0.59375 0.3125 1.375 0.3125q1.09375 0 1.640625 -0.4375q0.546875 -0.4375 0.546875 -1.015625q0 -0.4375 -0.328125 -0.8125q-0.328125 -0.390625 -1.640625 -0.953125q-1.3125 -0.5625 -1.671875 -0.78125q-0.609375 -0.375 -0.921875 -0.875q-0.3125 -0.515625 -0.3125 -1.171875q0 -1.140625 0.90625 -1.953125q0.921875 -0.828125 2.5625 -0.828125q1.828125 0 2.765625 0.84375q0.953125 0.84375 1.0 2.21875l-1.609375 0.109375q-0.046875 -0.875 -0.625 -1.390625q-0.578125 -0.515625 -1.65625 -0.515625q-0.84375 0 -1.328125 0.40625q-0.46875 0.390625 -0.46875 0.84375q0 0.453125 0.40625 0.796875q0.28125 0.234375 1.421875 0.734375q1.890625 0.8125 2.375 1.28125q0.78125 0.765625 0.78125 1.84375q0 0.71875 -0.4375 1.421875q-0.4375 0.6875 -1.34375 1.109375q-0.90625 0.40625 -2.140625 0.40625q-1.671875 0 -2.84375 -0.828125q-1.1875 -0.828125 -1.109375 -2.703125z" fill-rule="nonzero"/><path fill="#000000" fill-opacity="0.0" d="m198.14961 164.00919l109.44881 0l0 53.70079l-109.44881 0z" fill-rule="evenodd"/><path fill="#000000" d="m211.6696 187.61668l1.640625 -0.09375q0 0.703125 0.21875 1.21875q0.21875 0.5 0.796875 0.8125q0.59375 0.3125 1.375 0.3125q1.09375 0 1.640625 -0.4375q0.546875 -0.4375 0.546875 -1.015625q0 -0.4375 -0.328125 -0.8125q-0.328125 -0.390625 -1.640625 -0.953125q-1.3125 -0.5625 -1.671875 -0.78125q-0.609375 -0.375 -0.921875 -0.875q-0.3125 -0.515625 -0.3125 -1.171875q0 -1.140625 0.90625 -1.953125q0.921875 -0.828125 2.5625 -0.828125q1.828125 0 2.765625 0.84375q0.953125 0.84375 1.0 2.21875l-1.609375 0.109375q-0.046875 -0.875 -0.625 -1.390625q-0.578125 -0.515625 -1.65625 -0.515625q-0.84375 0 -1.328125 0.40625q-0.46875 0.390625 -0.46875 0.84375q0 0.453125 0.40625 0.796875q0.28125 0.234375 1.421875 0.734375q1.890625 0.8125 2.375 1.28125q0.78125 0.765625 0.78125 1.84375q0 0.71875 -0.4375 1.421875q-0.4375 0.6875 -1.34375 1.109375q-0.90625 0.40625 -2.140625 0.40625q-1.671875 0 -2.84375 -0.828125q-1.1875 -0.828125 -1.109375 -2.703125zm15.84375 -0.21875l1.65625 0.171875q-0.625 1.8125 -1.765625 2.703125q-1.140625 0.875 -2.609375 0.875q-1.578125 0 -2.5625 -1.015625q-0.96875 -1.03125 -0.96875 -2.859375q0 -1.578125 0.625 -3.109375q0.640625 -1.53125 1.796875 -2.328125q1.171875 -0.796875 2.6875 -0.796875q1.546875 0 2.453125 0.875q0.921875 0.875 0.921875 2.328125l-1.625 0.109375q-0.015625 -0.921875 -0.546875 -1.4375q-0.515625 -0.515625 -1.359375 -0.515625q-1.0 0 -1.734375 0.625q-0.71875 0.625 -1.140625 1.90625q-0.40625 1.28125 -0.40625 2.46875q0 1.234375 0.546875 1.859375q0.546875 0.609375 1.34375 0.609375q0.796875 0 1.53125 -0.609375q0.734375 -0.609375 1.15625 -1.859375zm9.171875 2.328125q-0.859375 0.734375 -1.65625 1.078125q-0.78125 0.34375 -1.6875 0.34375q-1.34375 0 -2.171875 -0.78125q-0.8125 -0.796875 -0.8125 -2.03125q0 -0.796875 0.375 -1.421875q0.375 -0.625 0.984375 -1.0q0.609375 -0.390625 1.484375 -0.546875q0.5625 -0.109375 2.109375 -0.171875q1.5625 -0.0625 2.234375 -0.328125q0.1875 -0.671875 0.1875 -1.125q0 -0.578125 -0.421875 -0.90625q-0.5625 -0.453125 -1.671875 -0.453125q-1.03125 0 -1.703125 0.46875q-0.65625 0.453125 -0.953125 1.296875l-1.671875 -0.140625q0.515625 -1.4375 1.609375 -2.203125q1.109375 -0.765625 2.796875 -0.765625q1.796875 0 2.84375 0.859375q0.796875 0.625 0.796875 1.65625q0 0.765625 -0.21875 1.796875l-0.53125 2.40625q-0.265625 1.140625 -0.265625 1.859375q0 0.453125 0.203125 1.3125l-1.671875 0q-0.125 -0.46875 -0.1875 -1.203125zm0.609375 -3.703125q-0.34375 0.140625 -0.75 0.21875q-0.390625 0.0625 -1.3125 0.15625q-1.4375 0.125 -2.03125 0.328125q-0.59375 0.1875 -0.90625 0.625q-0.296875 0.421875 -0.296875 0.9375q0 0.6875 0.484375 1.140625q0.484375 0.4375 1.359375 0.4375q0.828125 0 1.578125 -0.421875q0.75 -0.4375 1.1875 -1.203125q0.4375 -0.78125 0.6875 -2.21875zm7.094467 3.5625l-0.265625 1.359375q-0.59375 0.140625 -1.15625 0.140625q-0.984375 0 -1.5625 -0.46875q-0.4375 -0.375 -0.4375 -1.0q0 -0.3125 0.234375 -1.46875l1.171875 -5.625l-1.296875 0l0.265625 -1.265625l1.296875 0l0.5 -2.375l1.890625 -1.140625l-0.734375 3.515625l1.625 0l-0.28125 1.265625l-1.609375 0l-1.125 5.359375q-0.203125 1.015625 -0.203125 1.21875q0 0.28125 0.15625 0.4375q0.171875 0.15625 0.5625 0.15625q0.546875 0 0.96875 -0.109375zm5.183304 0l-0.265625 1.359375q-0.59375 0.140625 -1.15625 0.140625q-0.984375 0 -1.5625 -0.46875q-0.4375 -0.375 -0.4375 -1.0q0 -0.3125 0.234375 -1.46875l1.171875 -5.625l-1.296875 0l0.265625 -1.265625l1.296875 0l0.5 -2.375l1.890625 -1.140625l-0.734375 3.515625l1.625 0l-0.28125 1.265625l-1.609375 0l-1.125 5.359375q-0.203125 1.015625 -0.203125 1.21875q0 0.28125 0.15625 0.4375q0.171875 0.15625 0.5625 0.15625q0.546875 0 0.96875 -0.109375zm8.433304 -1.9375l1.609375 0.15625q-0.34375 1.1875 -1.59375 2.265625q-1.234375 1.078125 -2.96875 1.078125q-1.0625 0 -1.96875 -0.5q-0.890625 -0.5 -1.359375 -1.4375q-0.46875 -0.953125 -0.46875 -2.15625q0 -1.59375 0.734375 -3.078125q0.734375 -1.484375 1.890625 -2.203125q1.171875 -0.734375 2.53125 -0.734375q1.734375 0 2.765625 1.078125q1.03125 1.0625 1.03125 2.921875q0 0.71875 -0.125 1.46875l-7.125 0q-0.046875 0.28125 -0.046875 0.5q0 1.359375 0.625 2.078125q0.625 0.71875 1.53125 0.71875q0.84375 0 1.65625 -0.546875q0.828125 -0.5625 1.28125 -1.609375zm-4.78125 -2.40625l5.421875 0q0.015625 -0.25 0.015625 -0.359375q0 -1.234375 -0.625 -1.890625q-0.625 -0.671875 -1.59375 -0.671875q-1.0625 0 -1.9375 0.734375q-0.859375 0.71875 -1.28125 2.1875zm8.063202 5.6875l2.015625 -9.671875l1.453125 0l-0.40625 1.96875q0.75 -1.109375 1.453125 -1.640625q0.71875 -0.546875 1.46875 -0.546875q0.5 0 1.21875 0.359375l-0.671875 1.53125q-0.4375 -0.3125 -0.9375 -0.3125q-0.875 0 -1.78125 0.96875q-0.90625 0.953125 -1.4375 3.46875l-0.8125 3.875l-1.5625 0zm11.255371 0l2.796875 -13.359375l1.640625 0l-2.78125 13.359375l-1.65625 0zm6.613556 -11.484375l0.40625 -1.875l1.625 0l-0.390625 1.875l-1.640625 0zm-2.390625 11.484375l2.015625 -9.671875l1.65625 0l-2.03125 9.671875l-1.640625 0zm4.3635864 -3.3125l1.640625 -0.09375q0 0.703125 0.21875 1.21875q0.21875 0.5 0.796875 0.8125q0.59375 0.3125 1.375 0.3125q1.09375 0 1.640625 -0.4375q0.546875 -0.4375 0.546875 -1.015625q0 -0.4375 -0.328125 -0.8125q-0.328125 -0.390625 -1.640625 -0.953125q-1.3125 -0.5625 -1.671875 -0.78125q-0.609375 -0.375 -0.921875 -0.875q-0.3125 -0.515625 -0.3125 -1.171875q0 -1.140625 0.90625 -1.953125q0.921875 -0.828125 2.5625 -0.828125q1.828125 0 2.765625 0.84375q0.953125 0.84375 1.0 2.21875l-1.609375 0.109375q-0.046875 -0.875 -0.625 -1.390625q-0.578125 -0.515625 -1.65625 -0.515625q-0.84375 0 -1.328125 0.40625q-0.46875 0.390625 -0.46875 0.84375q0 0.453125 0.40625 0.796875q0.28125 0.234375 1.421875 0.734375q1.890625 0.8125 2.375 1.28125q0.78125 0.765625 0.78125 1.84375q0 0.71875 -0.4375 1.421875q-0.4375 0.6875 -1.34375 1.109375q-0.90625 0.40625 -2.140625 0.40625q-1.671875 0 -2.84375 -0.828125q-1.1875 -0.828125 -1.109375 -2.703125zm13.015625 1.96875l-0.265625 1.359375q-0.59375 0.140625 -1.15625 0.140625q-0.984375 0 -1.5625 -0.46875q-0.4375 -0.375 -0.4375 -1.0q0 -0.3125 0.234375 -1.46875l1.171875 -5.625l-1.296875 0l0.265625 -1.265625l1.296875 0l0.5 -2.375l1.890625 -1.140625l-0.734375 3.515625l1.625 0l-0.28125 1.265625l-1.609375 0l-1.125 5.359375q-0.203125 1.015625 -0.203125 1.21875q0 0.28125 0.15625 0.4375q0.171875 0.15625 0.5625 0.15625q0.546875 0 0.96875 -0.109375z" fill-rule="nonzero"/><path fill="#000000" fill-opacity="0.0" d="m198.14961 280.1392l109.44881 0l0 53.700806l-109.44881 0z" fill-rule="evenodd"/><path fill="#000000" d="m223.58026 303.7467l1.640625 -0.09375q0 0.703125 0.21875 1.21875q0.21875 0.5 0.796875 0.8125q0.59375 0.3125 1.375 0.3125q1.09375 0 1.640625 -0.4375q0.546875 -0.4375 0.546875 -1.015625q0 -0.4375 -0.328125 -0.8125q-0.328125 -0.390625 -1.640625 -0.953125q-1.3125 -0.5625 -1.671875 -0.78125q-0.609375 -0.375 -0.921875 -0.875q-0.3125 -0.515625 -0.3125 -1.171875q0 -1.140625 0.90625 -1.953125q0.921875 -0.828125 2.5625 -0.828125q1.828125 0 2.765625 0.84375q0.953125 0.84375 1.0 2.21875l-1.609375 0.109375q-0.046875 -0.875 -0.625 -1.390625q-0.578125 -0.515625 -1.65625 -0.515625q-0.84375 0 -1.328125 0.40625q-0.46875 0.390625 -0.46875 0.84375q0 0.453125 0.40625 0.796875q0.28125 0.234375 1.421875 0.734375q1.890625 0.8125 2.375 1.28125q0.78125 0.765625 0.78125 1.84375q0 0.71875 -0.4375 1.421875q-0.4375 0.6875 -1.34375 1.109375q-0.90625 0.40625 -2.140625 0.40625q-1.671875 0 -2.84375 -0.828125q-1.1875 -0.828125 -1.109375 -2.703125zm9.1875 3.3125l2.796875 -13.359375l1.640625 0l-1.734375 8.28125l4.8125 -4.59375l2.171875 0l-4.125 3.609375l2.5 6.0625l-1.8125 0l-1.921875 -4.96875l-2.015625 1.734375l-0.671875 3.234375l-1.640625 0zm7.5 3.703125l0 -1.1875l10.875 0l0 1.1875l-10.875 0zm12.188217 -3.703125l2.78125 -13.359375l1.6562653 0l-1.0000153 4.78125q0.78126526 -0.71875 1.4218903 -1.015625q0.640625 -0.296875 1.328125 -0.296875q1.359375 0 2.265625 1.015625q0.90625 1.0 0.90625 2.9375q0 1.28125 -0.375 2.359375q-0.359375 1.0625 -0.890625 1.78125q-0.53125 0.71875 -1.109375 1.15625q-0.578125 0.4375 -1.1875 0.640625q-0.59375 0.21875 -1.140625 0.21875q-0.96875 0 -1.7031403 -0.5q-0.71875 -0.515625 -1.125 -1.546875l-0.390625 1.828125l-1.4375 0zm2.4375 -3.96875l-0.015625 0.3125q0 1.234375 0.59375 1.890625q0.59376526 0.640625 1.4843903 0.640625q0.859375 0 1.578125 -0.609375q0.734375 -0.609375 1.1875 -1.890625q0.46875 -1.28125 0.46875 -2.375q0 -1.21875 -0.59375 -1.890625q-0.578125 -0.671875 -1.4375 -0.671875q-0.90625 0 -1.65625 0.6875q-0.73439026 0.6875 -1.2343903 2.125q-0.375 1.0625 -0.375 1.78125zm14.531967 2.21875q-1.734375 1.96875 -3.5625 1.96875q-1.109375 0 -1.796875 -0.640625q-0.6875 -0.640625 -0.6875 -1.578125q0 -0.609375 0.296875 -2.09375l1.171875 -5.578125l1.65625 0l-1.296875 6.1875q-0.171875 0.765625 -0.171875 1.203125q0 0.546875 0.328125 0.859375q0.34375 0.296875 0.984375 0.296875q0.703125 0 1.359375 -0.328125q0.65625 -0.34375 1.125 -0.921875q0.484375 -0.578125 0.796875 -1.359375q0.1875 -0.5 0.453125 -1.765625l0.875 -4.171875l1.65625 0l-2.03125 9.671875l-1.515625 0l0.359375 -1.75zm4.0007324 1.75l1.765625 -8.40625l-1.484375 0l0.265625 -1.265625l1.484375 0l0.28125 -1.375q0.21875 -1.03125 0.4375 -1.484375q0.234375 -0.453125 0.75 -0.75q0.53125 -0.296875 1.4375 -0.296875q0.625 0 1.828125 0.265625l-0.296875 1.4375q-0.84375 -0.21875 -1.40625 -0.21875q-0.484375 0 -0.734375 0.25q-0.25 0.234375 -0.4375 1.125l-0.21875 1.046875l1.84375 0l-0.265625 1.265625l-1.84375 0l-1.75 8.40625l-1.65625 0zm5.1832886 0l1.765625 -8.40625l-1.484375 0l0.265625 -1.265625l1.484375 0l0.28125 -1.375q0.21875 -1.03125 0.4375 -1.484375q0.234375 -0.453125 0.75 -0.75q0.53125 -0.296875 1.4375 -0.296875q0.625 0 1.828125 0.265625l-0.296875 1.4375q-0.84375 -0.21875 -1.40625 -0.21875q-0.484375 0 -0.734375 0.25q-0.25 0.234375 -0.4375 1.125l-0.21875 1.046875l1.84375 0l-0.265625 1.265625l-1.84375 0l-1.75 8.40625l-1.65625 0z" fill-rule="nonzero"/><path fill="#000000" fill-opacity="0.0" d="m163.81627 395.2362l178.11024 0l0 53.700806l-178.11024 0z" fill-rule="evenodd"/><path fill="#000000" d="m195.60925 418.62497l1.65625 0.171875q-0.625 1.8125 -1.765625 2.703125q-1.140625 0.875 -2.609375 0.875q-1.578125 0 -2.5625 -1.015625q-0.96875 -1.03125 -0.96875 -2.859375q0 -1.578125 0.625 -3.109375q0.640625 -1.53125 1.796875 -2.328125q1.171875 -0.796875 2.6875 -0.796875q1.546875 0 2.453125 0.875q0.921875 0.875 0.921875 2.328125l-1.625 0.109375q-0.015625 -0.921875 -0.546875 -1.4375q-0.515625 -0.515625 -1.359375 -0.515625q-1.0 0 -1.734375 0.625q-0.71875 0.625 -1.140625 1.90625q-0.40625 1.28125 -0.40625 2.46875q0 1.234375 0.546875 1.859375q0.546875 0.609375 1.34375 0.609375q0.796875 0 1.53125 -0.609375q0.734375 -0.609375 1.15625 -1.859375zm2.9375 -0.140625q0 -2.828125 1.671875 -4.6875q1.375 -1.53125 3.609375 -1.53125q1.75 0 2.8125 1.09375q1.078125 1.09375 1.078125 2.953125q0 1.65625 -0.671875 3.09375q-0.671875 1.4375 -1.921875 2.203125q-1.25 0.765625 -2.625 0.765625q-1.125 0 -2.046875 -0.484375q-0.921875 -0.484375 -1.421875 -1.359375q-0.484375 -0.890625 -0.484375 -2.046875zm1.65625 -0.15625q0 1.359375 0.65625 2.0625q0.65625 0.703125 1.65625 0.703125q0.53125 0 1.046875 -0.203125q0.53125 -0.21875 0.96875 -0.65625q0.453125 -0.4375 0.765625 -1.0q0.3125 -0.5625 0.5 -1.203125q0.28125 -0.90625 0.28125 -1.734375q0 -1.3125 -0.65625 -2.03125q-0.65625 -0.734375 -1.65625 -0.734375q-0.78125 0 -1.421875 0.375q-0.625 0.375 -1.140625 1.09375q-0.515625 0.703125 -0.765625 1.640625q-0.234375 0.9375 -0.234375 1.6875zm8.438217 3.828125l2.015625 -9.671875l1.5 0l-0.359375 1.6875q0.96875 -1.0 1.8125 -1.453125q0.859375 -0.453125 1.734375 -0.453125q1.1875 0 1.84375 0.640625q0.671875 0.625 0.671875 1.703125q0 0.53125 -0.234375 1.6875l-1.234375 5.859375l-1.640625 0l1.28125 -6.125q0.1875 -0.890625 0.1875 -1.328125q0 -0.484375 -0.328125 -0.78125q-0.328125 -0.296875 -0.953125 -0.296875q-1.28125 0 -2.265625 0.90625q-0.984375 0.90625 -1.453125 3.125l-0.9375 4.5l-1.640625 0zm14.219467 -1.34375l-0.265625 1.359375q-0.59375 0.140625 -1.15625 0.140625q-0.984375 0 -1.5625 -0.46875q-0.4375 -0.375 -0.4375 -1.0q0 -0.3125 0.234375 -1.46875l1.171875 -5.625l-1.296875 0l0.265625 -1.265625l1.296875 0l0.5 -2.375l1.890625 -1.140625l-0.734375 3.515625l1.625 0l-0.28125 1.265625l-1.609375 0l-1.125 5.359375q-0.203125 1.015625 -0.203125 1.21875q0 0.28125 0.15625 0.4375q0.171875 0.15625 0.5625 0.15625q0.546875 0 0.96875 -0.109375zm8.433304 -1.9375l1.609375 0.15625q-0.34375 1.1875 -1.59375 2.265625q-1.234375 1.078125 -2.96875 1.078125q-1.0625 0 -1.96875 -0.5q-0.890625 -0.5 -1.359375 -1.4375q-0.46875 -0.953125 -0.46875 -2.15625q0 -1.59375 0.734375 -3.078125q0.734375 -1.484375 1.890625 -2.203125q1.171875 -0.734375 2.53125 -0.734375q1.734375 0 2.765625 1.078125q1.03125 1.0625 1.03125 2.921875q0 0.71875 -0.125 1.46875l-7.125 0q-0.046875 0.28125 -0.046875 0.5q0 1.359375 0.625 2.078125q0.625 0.71875 1.53125 0.71875q0.84375 0 1.65625 -0.546875q0.828125 -0.5625 1.28125 -1.609375zm-4.78125 -2.40625l5.421875 0q0.015625 -0.25 0.015625 -0.359375q0 -1.234375 -0.625 -1.890625q-0.625 -0.671875 -1.59375 -0.671875q-1.0625 0 -1.9375 0.734375q-0.859375 0.71875 -1.28125 2.1875zm7.406967 5.6875l4.21875 -4.90625l-2.421875 -4.765625l1.828125 0l0.8125 1.71875q0.453125 0.96875 0.828125 1.84375l2.78125 -3.5625l2.015625 0l-4.0625 4.890625l2.4375 4.78125l-1.8125 0l-0.96875 -1.96875q-0.3125 -0.625 -0.703125 -1.5625l-2.875 3.53125l-2.078125 0zm13.828125 -1.34375l-0.265625 1.359375q-0.59375 0.140625 -1.15625 0.140625q-0.984375 0 -1.5625 -0.46875q-0.4375 -0.375 -0.4375 -1.0q0 -0.3125 0.234375 -1.46875l1.171875 -5.625l-1.296875 0l0.265625 -1.265625l1.296875 0l0.5 -2.375l1.890625 -1.140625l-0.734375 3.515625l1.625 0l-0.28125 1.265625l-1.609375 0l-1.125 5.359375q-0.203125 1.015625 -0.203125 1.21875q0 0.28125 0.15625 0.4375q0.171875 0.15625 0.5625 0.15625q0.546875 0 0.96875 -0.109375zm11.210358 -0.8125l0 -3.671875l-3.640625 0l0 -1.515625l3.640625 0l0 -3.640625l1.546875 0l0 3.640625l3.640625 0l0 1.515625l-3.640625 0l0 3.671875l-1.546875 0zm11.390778 2.15625l2.78125 -13.359375l1.65625 0l-1.0 4.78125q0.78125 -0.71875 1.421875 -1.015625q0.640625 -0.296875 1.328125 -0.296875q1.359375 0 2.265625 1.015625q0.90625 1.0 0.90625 2.9375q0 1.28125 -0.375 2.359375q-0.359375 1.0625 -0.890625 1.78125q-0.53125 0.71875 -1.109375 1.15625q-0.578125 0.4375 -1.1875 0.640625q-0.59375 0.21875 -1.140625 0.21875q-0.96875 0 -1.703125 -0.5q-0.71875 -0.515625 -1.125 -1.546875l-0.390625 1.828125l-1.4375 0zm2.4375 -3.96875l-0.015625 0.3125q0 1.234375 0.59375 1.890625q0.59375 0.640625 1.484375 0.640625q0.859375 0 1.578125 -0.609375q0.734375 -0.609375 1.1875 -1.890625q0.46875 -1.28125 0.46875 -2.375q0 -1.21875 -0.59375 -1.890625q-0.578125 -0.671875 -1.4375 -0.671875q-0.90625 0 -1.65625 0.6875q-0.734375 0.6875 -1.234375 2.125q-0.375 1.0625 -0.375 1.78125zm14.531952 2.21875q-1.734375 1.96875 -3.5625 1.96875q-1.109375 0 -1.796875 -0.640625q-0.6875 -0.640625 -0.6875 -1.578125q0 -0.609375 0.296875 -2.09375l1.171875 -5.578125l1.65625 0l-1.296875 6.1875q-0.171875 0.765625 -0.171875 1.203125q0 0.546875 0.328125 0.859375q0.34375 0.296875 0.984375 0.296875q0.703125 0 1.359375 -0.328125q0.65625 -0.34375 1.125 -0.921875q0.484375 -0.578125 0.796875 -1.359375q0.1875 -0.5 0.453125 -1.765625l0.875 -4.171875l1.65625 0l-2.03125 9.671875l-1.515625 0l0.359375 -1.75zm4.0007324 1.75l1.765625 -8.40625l-1.484375 0l0.265625 -1.265625l1.484375 0l0.28125 -1.375q0.21875 -1.03125 0.4375 -1.484375q0.234375 -0.453125 0.75 -0.75q0.53125 -0.296875 1.4375 -0.296875q0.625 0 1.828125 0.265625l-0.296875 1.4375q-0.84375 -0.21875 -1.40625 -0.21875q-0.484375 0 -0.734375 0.25q-0.25 0.234375 -0.4375 1.125l-0.21875 1.046875l1.84375 0l-0.265625 1.265625l-1.84375 0l-1.75 8.40625l-1.65625 0zm5.1832886 0l1.765625 -8.40625l-1.484375 0l0.265625 -1.265625l1.484375 0l0.28125 -1.375q0.21875 -1.03125 0.4375 -1.484375q0.234375 -0.453125 0.75 -0.75q0.53125 -0.296875 1.4375 -0.296875q0.625 0 1.828125 0.265625l-0.296875 1.4375q-0.84375 -0.21875 -1.40625 -0.21875q-0.484375 0 -0.734375 0.25q-0.25 0.234375 -0.4375 1.125l-0.21875 1.046875l1.84375 0l-0.265625 1.265625l-1.84375 0l-1.75 8.40625l-1.65625 0zm12.058319 -3.28125l1.609375 0.15625q-0.34375 1.1875 -1.59375 2.265625q-1.234375 1.078125 -2.96875 1.078125q-1.0625 0 -1.96875 -0.5q-0.890625 -0.5 -1.359375 -1.4375q-0.46875 -0.953125 -0.46875 -2.15625q0 -1.59375 0.734375 -3.078125q0.734375 -1.484375 1.890625 -2.203125q1.171875 -0.734375 2.53125 -0.734375q1.734375 0 2.765625 1.078125q1.03125 1.0625 1.03125 2.921875q0 0.71875 -0.125 1.46875l-7.125 0q-0.046875 0.28125 -0.046875 0.5q0 1.359375 0.625 2.078125q0.625 0.71875 1.53125 0.71875q0.84375 0 1.65625 -0.546875q0.828125 -0.5625 1.28125 -1.609375zm-4.78125 -2.40625l5.421875 0q0.015625 -0.25 0.015625 -0.359375q0 -1.234375 -0.625 -1.890625q-0.625 -0.671875 -1.59375 -0.671875q-1.0625 0 -1.9375 0.734375q-0.859375 0.71875 -1.28125 2.1875zm8.063202 5.6875l2.015625 -9.671875l1.453125 0l-0.40625 1.96875q0.75 -1.109375 1.453125 -1.640625q0.71875 -0.546875 1.46875 -0.546875q0.5 0 1.21875 0.359375l-0.671875 1.53125q-0.4375 -0.3125 -0.9375 -0.3125q-0.875 0 -1.78125 0.96875q-0.90625 0.953125 -1.4375 3.46875l-0.8125 3.875l-1.5625 0z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m0 165.96588l118.74016 0l0 40.25197l-118.74016 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m0 165.96588l118.74016 0l0 40.25197l-118.74016 0z" fill-rule="evenodd"/><path fill="#000000" d="m23.145836 190.12123l1.625 -0.25q0.125 0.96875 0.75 1.5q0.625 0.515625 1.75 0.515625q1.125 0 1.671875 -0.453125q0.546875 -0.46875 0.546875 -1.09375q0 -0.546875 -0.484375 -0.875q-0.328125 -0.21875 -1.671875 -0.546875q-1.8125 -0.46875 -2.515625 -0.796875q-0.6875 -0.328125 -1.046875 -0.90625q-0.359375 -0.59375 -0.359375 -1.3125q0 -0.640625 0.296875 -1.1875q0.296875 -0.5625 0.8125 -0.921875q0.375 -0.28125 1.03125 -0.46875q0.671875 -0.203125 1.421875 -0.203125q1.140625 0 2.0 0.328125q0.859375 0.328125 1.265625 0.890625q0.421875 0.5625 0.578125 1.5l-1.609375 0.21875q-0.109375 -0.75 -0.640625 -1.171875q-0.515625 -0.421875 -1.46875 -0.421875q-1.140625 0 -1.625 0.375q-0.46875 0.375 -0.46875 0.875q0 0.3125 0.1875 0.578125q0.203125 0.265625 0.640625 0.4375q0.234375 0.09375 1.4375 0.421875q1.75 0.453125 2.4375 0.75q0.6875 0.296875 1.078125 0.859375q0.390625 0.5625 0.390625 1.40625q0 0.828125 -0.484375 1.546875q-0.46875 0.71875 -1.375 1.125q-0.90625 0.390625 -2.046875 0.390625q-1.875 0 -2.875 -0.78125q-0.984375 -0.78125 -1.25 -2.328125zm13.5625 1.421875l0.234375 1.453125q-0.6875 0.140625 -1.234375 0.140625q-0.890625 0 -1.390625 -0.28125q-0.484375 -0.28125 -0.6875 -0.734375q-0.203125 -0.46875 -0.203125 -1.9375l0 -5.578125l-1.203125 0l0 -1.265625l1.203125 0l0 -2.390625l1.625 -0.984375l0 3.375l1.65625 0l0 1.265625l-1.65625 0l0 5.671875q0 0.6875 0.078125 0.890625q0.09375 0.203125 0.28125 0.328125q0.203125 0.109375 0.578125 0.109375q0.265625 0 0.71875 -0.0625zm1.5895538 1.46875l0 -9.671875l1.46875 0l0 1.46875q0.5625 -1.03125 1.03125 -1.359375q0.484375 -0.328125 1.0625 -0.328125q0.828125 0 1.6875 0.53125l-0.5625 1.515625q-0.609375 -0.359375 -1.203125 -0.359375q-0.546875 0 -0.96875 0.328125q-0.421875 0.328125 -0.609375 0.890625q-0.28125 0.875 -0.28125 1.921875l0 5.0625l-1.625 0zm6.228302 3.703125l0 -13.375l1.484375 0l0 1.25q0.53125 -0.734375 1.1875 -1.09375q0.671875 -0.375 1.625 -0.375q1.234375 0 2.171875 0.640625q0.953125 0.625 1.4375 1.796875q0.484375 1.15625 0.484375 2.546875q0 1.484375 -0.53125 2.671875q-0.53125 1.1875 -1.546875 1.828125q-1.015625 0.625 -2.140625 0.625q-0.8125 0 -1.46875 -0.34375q-0.65625 -0.34375 -1.0625 -0.875l0 4.703125l-1.640625 0zm1.484375 -8.484375q0 1.859375 0.75 2.765625q0.765625 0.890625 1.828125 0.890625q1.09375 0 1.875 -0.921875q0.78125 -0.9375 0.78125 -2.875q0 -1.84375 -0.765625 -2.765625q-0.75 -0.921875 -1.8125 -0.921875q-1.046875 0 -1.859375 0.984375q-0.796875 0.96875 -0.796875 2.84375zm15.203842 3.59375q-0.921875 0.765625 -1.765625 1.09375q-0.828125 0.3125 -1.796875 0.3125q-1.59375 0 -2.453125 -0.78125q-0.859375 -0.78125 -0.859375 -1.984375q0 -0.71875 0.328125 -1.296875q0.328125 -0.59375 0.84375 -0.9375q0.53125 -0.359375 1.1875 -0.546875q0.46875 -0.125 1.453125 -0.25q1.984375 -0.234375 2.921875 -0.5625q0.015625 -0.34375 0.015625 -0.421875q0 -1.0 -0.46875 -1.421875q-0.625 -0.546875 -1.875 -0.546875q-1.15625 0 -1.703125 0.40625q-0.546875 0.40625 -0.8125 1.421875l-1.609375 -0.21875q0.21875 -1.015625 0.71875 -1.640625q0.5 -0.640625 1.453125 -0.984375q0.953125 -0.34375 2.1875 -0.34375q1.25 0 2.015625 0.296875q0.78125 0.28125 1.140625 0.734375q0.375 0.4375 0.515625 1.109375q0.078125 0.421875 0.078125 1.515625l0 2.1875q0 2.28125 0.109375 2.890625q0.109375 0.59375 0.40625 1.15625l-1.703125 0q-0.265625 -0.515625 -0.328125 -1.1875zm-0.140625 -3.671875q-0.890625 0.375 -2.671875 0.625q-1.015625 0.140625 -1.4375 0.328125q-0.421875 0.1875 -0.65625 0.53125q-0.21875 0.34375 -0.21875 0.78125q0 0.65625 0.5 1.09375q0.5 0.4375 1.453125 0.4375q0.9375 0 1.671875 -0.40625q0.75 -0.421875 1.09375 -1.140625q0.265625 -0.5625 0.265625 -1.640625l0 -0.609375zm4.188217 4.859375l0 -9.671875l1.46875 0l0 1.46875q0.5625 -1.03125 1.03125 -1.359375q0.484375 -0.328125 1.0625 -0.328125q0.828125 0 1.6875 0.53125l-0.5625 1.515625q-0.609375 -0.359375 -1.203125 -0.359375q-0.546875 0 -0.96875 0.328125q-0.421875 0.328125 -0.609375 0.890625q-0.28125 0.875 -0.28125 1.921875l0 5.0625l-1.625 0zm5.572052 -2.890625l1.625 -0.25q0.125 0.96875 0.75 1.5q0.625 0.515625 1.75 0.515625q1.125 0 1.671875 -0.453125q0.546875 -0.46875 0.546875 -1.09375q0 -0.546875 -0.484375 -0.875q-0.328125 -0.21875 -1.671875 -0.546875q-1.8125 -0.46875 -2.515625 -0.796875q-0.6875 -0.328125 -1.046875 -0.90625q-0.359375 -0.59375 -0.359375 -1.3125q0 -0.640625 0.296875 -1.1875q0.296875 -0.5625 0.8125 -0.921875q0.375 -0.28125 1.03125 -0.46875q0.671875 -0.203125 1.421875 -0.203125q1.140625 0 2.0 0.328125q0.859375 0.328125 1.265625 0.890625q0.421875 0.5625 0.578125 1.5l-1.609375 0.21875q-0.109375 -0.75 -0.640625 -1.171875q-0.515625 -0.421875 -1.46875 -0.421875q-1.140625 0 -1.625 0.375q-0.46875 0.375 -0.46875 0.875q0 0.3125 0.1875 0.578125q0.203125 0.265625 0.640625 0.4375q0.234375 0.09375 1.4375 0.421875q1.75 0.453125 2.4375 0.75q0.6875 0.296875 1.078125 0.859375q0.390625 0.5625 0.390625 1.40625q0 0.828125 -0.484375 1.546875q-0.46875 0.71875 -1.375 1.125q-0.90625 0.390625 -2.046875 0.390625q-1.875 0 -2.875 -0.78125q-0.984375 -0.78125 -1.25 -2.328125zm16.609375 -0.21875l1.6875 0.203125q-0.40625 1.484375 -1.484375 2.3125q-1.078125 0.8125 -2.765625 0.8125q-2.125 0 -3.375 -1.296875q-1.234375 -1.3125 -1.234375 -3.671875q0 -2.453125 1.25 -3.796875q1.265625 -1.34375 3.265625 -1.34375q1.9375 0 3.15625 1.328125q1.234375 1.3125 1.234375 3.703125q0 0.15625 0 0.4375l-7.21875 0q0.09375 1.59375 0.90625 2.453125q0.8125 0.84375 2.015625 0.84375q0.90625 0 1.546875 -0.46875q0.640625 -0.484375 1.015625 -1.515625zm-5.390625 -2.65625l5.40625 0q-0.109375 -1.21875 -0.625 -1.828125q-0.78125 -0.953125 -2.03125 -0.953125q-1.125 0 -1.90625 0.765625q-0.765625 0.75 -0.84375 2.015625zm9.125717 5.765625l0 -9.671875l1.46875 0l0 1.46875q0.5625 -1.03125 1.03125 -1.359375q0.484375 -0.328125 1.0625 -0.328125q0.828125 0 1.6875 0.53125l-0.5625 1.515625q-0.609375 -0.359375 -1.203125 -0.359375q-0.546875 0 -0.96875 0.328125q-0.421875 0.328125 -0.609375 0.890625q-0.28125 0.875 -0.28125 1.921875l0 5.0625l-1.625 0z" fill-rule="nonzero"/></g></svg>

Documentation/networking/tls-offload-reorder-bad.svg

···
+<svg version="1.1" viewBox="0.0 0.0 672.0 68.0" fill="none" stroke="none" stroke-linecap="square" stroke-miterlimit="10" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><clipPath id="p.0"><path d="m0 0l960.0 0l0 720.0l-960.0 0l0 -720.0z" clip-rule="nonzero"/></clipPath><g clip-path="url(#p.0)"><path fill="#000000" fill-opacity="0.0" d="m0 0l960.0 0l0 720.0l-960.0 0z" fill-rule="evenodd"/><path fill="#b6d7a8" d="m0 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m0 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m15.953125 52.942722l-1.640625 0l0 -10.453125q-0.59375 0.5625 -1.5625 1.140625q-0.953125 0.5625 -1.71875 0.84375l0 -1.59375q1.375 -0.640625 2.40625 -1.5625q1.03125 -0.921875 1.453125 -1.78125l1.0625 0l0 13.40625z" fill-rule="nonzero"/><path fill="#c9daf8" d="m340.69897 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m340.69897 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m355.73022 52.942722l0 -3.203125l-5.796875 0l0 -1.5l6.09375 -8.65625l1.34375 0l0 8.65625l1.796875 0l0 1.5l-1.796875 0l0 3.203125l-1.640625 0zm0 -4.703125l0 -6.015625l-4.1875 6.015625l4.1875 0z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m225.37527 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m225.37527 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m235.15652 49.411472l1.640625 -0.21875q0.28125 1.40625 0.953125 2.015625q0.6875 0.609375 1.65625 0.609375q1.15625 0 1.953125 -0.796875q0.796875 -0.796875 0.796875 -1.984375q0 -1.125 -0.734375 -1.859375q-0.734375 -0.734375 -1.875 -0.734375q-0.46875 0 -1.15625 0.171875l0.1875 -1.4375q0.15625 0.015625 0.265625 0.015625q1.046875 0 1.875 -0.546875q0.84375 -0.546875 0.84375 -1.671875q0 -0.90625 -0.609375 -1.5q-0.609375 -0.59375 -1.578125 -0.59375q-0.953125 0 -1.59375 0.609375q-0.640625 0.59375 -0.8125 1.796875l-1.640625 -0.296875q0.296875 -1.640625 1.359375 -2.546875q1.0625 -0.90625 2.65625 -0.90625q1.09375 0 2.0 0.46875q0.921875 0.46875 1.40625 1.28125q0.5 0.8125 0.5 1.71875q0 0.859375 -0.46875 1.578125q-0.46875 0.703125 -1.375 1.125q1.1875 0.28125 1.84375 1.140625q0.65625 0.859375 0.65625 2.15625q0 1.734375 -1.28125 2.953125q-1.265625 1.21875 -3.21875 1.21875q-1.765625 0 -2.921875 -1.046875q-1.15625 -1.046875 -1.328125 -2.71875z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m572.3295 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m572.3295 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m590.72015 51.364597l0 1.578125l-8.828125 0q-0.015625 -0.59375 0.1875 -1.140625q0.34375 -0.90625 1.078125 -1.78125q0.75 -0.875 2.15625 -2.015625q2.171875 -1.78125 2.9375 -2.828125q0.765625 -1.046875 0.765625 -1.96875q0 -0.984375 -0.703125 -1.640625q-0.6875 -0.671875 -1.8125 -0.671875q-1.1875 0 -1.90625 0.71875q-0.703125 0.703125 -0.703125 1.953125l-1.6875 -0.171875q0.171875 -1.890625 1.296875 -2.875q1.140625 -0.984375 3.03125 -0.984375q1.921875 0 3.046875 1.0625q1.125 1.0625 1.125 2.640625q0 0.796875 -0.328125 1.578125q-0.328125 0.78125 -1.09375 1.640625q-0.75 0.84375 -2.53125 2.34375q-1.46875 1.234375 -1.890625 1.6875q-0.421875 0.4375 -0.6875 0.875l6.546875 0z" fill-rule="nonzero"/><path fill="#e06666" d="m615.56793 24.999102l6.5512085 0l0 42.04725l-6.5512085 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m615.56793 24.999102l6.5512085 0l0 42.04725l-6.5512085 0z" fill-rule="evenodd"/><path fill="#c9daf8" d="m456.51425 24.999102l99.02365 0l0 42.04725l-99.02365 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m456.51425 24.999102l99.02365 0l0 42.04725l-99.02365 0z" fill-rule="evenodd"/><path fill="#000000" d="m466.2955 49.442722l1.71875 -0.140625q0.1875 1.25 0.875 1.890625q0.703125 0.625 1.6875 0.625q1.1875 0 2.0 -0.890625q0.828125 -0.890625 0.828125 -2.359375q0 -1.40625 -0.796875 -2.21875q-0.78125 -0.8125 -2.0625 -0.8125q-0.78125 0 -1.421875 0.359375q-0.640625 0.359375 -1.0 0.9375l-1.546875 -0.203125l1.296875 -6.859375l6.640625 0l0 1.5625l-5.328125 0l-0.71875 3.59375q1.203125 -0.84375 2.515625 -0.84375q1.75 0 2.953125 1.21875q1.203125 1.203125 1.203125 3.109375q0 1.8125 -1.046875 3.140625q-1.296875 1.625 -3.515625 1.625q-1.8125 0 -2.96875 -1.015625q-1.15625 -1.03125 -1.3125 -2.71875z" fill-rule="nonzero"/><path fill="#e06666" d="m391.1985 24.999102l6.551178 0l0 42.04725l-6.551178 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m391.1985 24.999102l6.551178 0l0 42.04725l-6.551178 0z" fill-rule="evenodd"/><path fill="#000000" fill-opacity="0.0" d="m114.43843 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" stroke-dasharray="4.0,3.0" d="m114.43843 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" fill-opacity="0.0" d="m163.95024 24.999102c0 -12.5 114.47246 -25.007874 228.9449 -25.0c114.47241 0.007874016 228.94489 12.531496 228.94489 25.062992" fill-rule="evenodd"/><path stroke="#000000" stroke-width="2.0" stroke-linejoin="round" stroke-linecap="butt" d="m163.95024 24.9991c0 -12.499998 114.47246 -25.007872 228.9449 -24.999998c57.236206 0.003937008 114.47244 3.136811 157.3996 7.835138c21.463562 2.3491635 39.349915 5.0896897 51.8703 8.026144c3.130127 0.7341137 5.9248657 1.4804726 8.356262 2.236023c0.30395508 0.09444237 0.6022339 0.1890316 0.89471436 0.28375435l0.37457275 0.12388611" fill-rule="evenodd"/><path fill="#000000" stroke="#000000" stroke-width="2.0" stroke-linecap="butt" d="m609.98517 21.270555l9.406311 2.1936665l-5.7955933 -7.7266836z" fill-rule="evenodd"/><path fill="#e06666" d="m47.56793 24.999102l6.551182 0l0 42.04725l-6.551182 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m47.56793 24.999102l6.551182 0l0 42.04725l-6.551182 0z" fill-rule="evenodd"/></g></svg>

Documentation/networking/tls-offload-reorder-good.svg

···
+<svg version="1.1" viewBox="0.0 0.0 672.0 68.0" fill="none" stroke="none" stroke-linecap="square" stroke-miterlimit="10" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><clipPath id="p.0"><path d="m0 0l960.0 0l0 720.0l-960.0 0l0 -720.0z" clip-rule="nonzero"/></clipPath><g clip-path="url(#p.0)"><path fill="#000000" fill-opacity="0.0" d="m0 0l960.0 0l0 720.0l-960.0 0z" fill-rule="evenodd"/><path fill="#b6d7a8" d="m0 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m0 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m15.953125 52.942722l-1.640625 0l0 -10.453125q-0.59375 0.5625 -1.5625 1.140625q-0.953125 0.5625 -1.71875 0.84375l0 -1.59375q1.375 -0.640625 2.40625 -1.5625q1.03125 -0.921875 1.453125 -1.78125l1.0625 0l0 13.40625z" fill-rule="nonzero"/><path fill="#b6d7a8" d="m340.69897 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m340.69897 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m355.73022 52.942722l0 -3.203125l-5.796875 0l0 -1.5l6.09375 -8.65625l1.34375 0l0 8.65625l1.796875 0l0 1.5l-1.796875 0l0 3.203125l-1.640625 0zm0 -4.703125l0 -6.015625l-4.1875 6.015625l4.1875 0z" fill-rule="nonzero"/><path fill="#cfe2f3" d="m225.37527 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m225.37527 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m235.15652 49.411472l1.640625 -0.21875q0.28125 1.40625 0.953125 2.015625q0.6875 0.609375 1.65625 0.609375q1.15625 0 1.953125 -0.796875q0.796875 -0.796875 0.796875 -1.984375q0 -1.125 -0.734375 -1.859375q-0.734375 -0.734375 -1.875 -0.734375q-0.46875 0 -1.15625 0.171875l0.1875 -1.4375q0.15625 0.015625 0.265625 0.015625q1.046875 0 1.875 -0.546875q0.84375 -0.546875 0.84375 -1.671875q0 -0.90625 -0.609375 -1.5q-0.609375 -0.59375 -1.578125 -0.59375q-0.953125 0 -1.59375 0.609375q-0.640625 0.59375 -0.8125 1.796875l-1.640625 -0.296875q0.296875 -1.640625 1.359375 -2.546875q1.0625 -0.90625 2.65625 -0.90625q1.09375 0 2.0 0.46875q0.921875 0.46875 1.40625 1.28125q0.5 0.8125 0.5 1.71875q0 0.859375 -0.46875 1.578125q-0.46875 0.703125 -1.375 1.125q1.1875 0.28125 1.84375 1.140625q0.65625 0.859375 0.65625 2.15625q0 1.734375 -1.28125 2.953125q-1.265625 1.21875 -3.21875 1.21875q-1.765625 0 -2.921875 -1.046875q-1.15625 -1.046875 -1.328125 -2.71875z" fill-rule="nonzero"/><path fill="#e06666" d="m271.56793 24.999102l6.551178 0l0 42.04725l-6.551178 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m271.56793 24.999102l6.551178 0l0 42.04725l-6.551178 0z" fill-rule="evenodd"/><path fill="#cfe2f3" d="m572.3295 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m572.3295 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" d="m590.72015 51.364597l0 1.578125l-8.828125 0q-0.015625 -0.59375 0.1875 -1.140625q0.34375 -0.90625 1.078125 -1.78125q0.75 -0.875 2.15625 -2.015625q2.171875 -1.78125 2.9375 -2.828125q0.765625 -1.046875 0.765625 -1.96875q0 -0.984375 -0.703125 -1.640625q-0.6875 -0.671875 -1.8125 -0.671875q-1.1875 0 -1.90625 0.71875q-0.703125 0.703125 -0.703125 1.953125l-1.6875 -0.171875q0.171875 -1.890625 1.296875 -2.875q1.140625 -0.984375 3.03125 -0.984375q1.921875 0 3.046875 1.0625q1.125 1.0625 1.125 2.640625q0 0.796875 -0.328125 1.578125q-0.328125 0.78125 -1.09375 1.640625q-0.75 0.84375 -2.53125 2.34375q-1.46875 1.234375 -1.890625 1.6875q-0.421875 0.4375 -0.6875 0.875l6.546875 0z" fill-rule="nonzero"/><path fill="#b6d7a8" d="m456.51425 24.999102l99.02365 0l0 42.04725l-99.02365 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m456.51425 24.999102l99.02365 0l0 42.04725l-99.02365 0z" fill-rule="evenodd"/><path fill="#000000" d="m466.2955 49.442722l1.71875 -0.140625q0.1875 1.25 0.875 1.890625q0.703125 0.625 1.6875 0.625q1.1875 0 2.0 -0.890625q0.828125 -0.890625 0.828125 -2.359375q0 -1.40625 -0.796875 -2.21875q-0.78125 -0.8125 -2.0625 -0.8125q-0.78125 0 -1.421875 0.359375q-0.640625 0.359375 -1.0 0.9375l-1.546875 -0.203125l1.296875 -6.859375l6.640625 0l0 1.5625l-5.328125 0l-0.71875 3.59375q1.203125 -0.84375 2.515625 -0.84375q1.75 0 2.953125 1.21875q1.203125 1.203125 1.203125 3.109375q0 1.8125 -1.046875 3.140625q-1.296875 1.625 -3.515625 1.625q-1.8125 0 -2.96875 -1.015625q-1.15625 -1.03125 -1.3125 -2.71875z" fill-rule="nonzero"/><path fill="#e06666" d="m503.1985 24.999102l6.551178 0l0 42.04725l-6.551178 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m503.1985 24.999102l6.551178 0l0 42.04725l-6.551178 0z" fill-rule="evenodd"/><path fill="#000000" fill-opacity="0.0" d="m114.43843 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" stroke-dasharray="4.0,3.0" d="m114.43843 24.999102l99.02362 0l0 42.04725l-99.02362 0z" fill-rule="evenodd"/><path fill="#000000" fill-opacity="0.0" d="m163.95024 24.999102c0 -12.5 114.47246 -25.007874 228.9449 -25.0c114.47241 0.007874016 228.94489 12.531496 228.94489 25.062992" fill-rule="evenodd"/><path stroke="#000000" stroke-width="2.0" stroke-linejoin="round" stroke-linecap="butt" d="m163.95024 24.9991c0 -12.499998 114.47246 -25.007872 228.9449 -24.999998c57.236206 0.003937008 114.47244 3.136811 157.3996 7.835138c21.463562 2.3491635 39.349915 5.0896897 51.8703 8.026144c3.130127 0.7341137 5.9248657 1.4804726 8.356262 2.236023c0.30395508 0.09444237 0.6022339 0.1890316 0.89471436 0.28375435l0.37457275 0.12388611" fill-rule="evenodd"/><path fill="#000000" stroke="#000000" stroke-width="2.0" stroke-linecap="butt" d="m609.98517 21.270555l9.406311 2.1936665l-5.7955933 -7.7266836z" fill-rule="evenodd"/><path fill="#e06666" d="m47.56793 24.999102l6.551182 0l0 42.04725l-6.551182 0z" fill-rule="evenodd"/><path stroke="#000000" stroke-width="1.0" stroke-linejoin="round" stroke-linecap="butt" d="m47.56793 24.999102l6.551182 0l0 42.04725l-6.551182 0z" fill-rule="evenodd"/></g></svg>

Documentation/networking/tls-offload.rst

···
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+==================
+Kernel TLS offload
+==================
+
+Kernel TLS operation
+====================
+
+Linux kernel provides TLS connection offload infrastructure. Once a TCP
+connection is in ``ESTABLISHED`` state user space can enable the TLS Upper
+Layer Protocol (ULP) and install the cryptographic connection state.
+For details regarding the user-facing interface refer to the TLS
+documentation in :ref:`Documentation/networking/tls.rst <kernel_tls>`.
+
+``ktls`` can operate in three modes:
+
+ * Software crypto mode (``TLS_SW``) - CPU handles the cryptography.
+   In most basic cases only crypto operations synchronous with the CPU
+   can be used, but depending on calling context CPU may utilize
+   asynchronous crypto accelerators. The use of accelerators introduces extra
+   latency on socket reads (decryption only starts when a read syscall
+   is made) and additional I/O load on the system.
+ * Packet-based NIC offload mode (``TLS_HW``) - the NIC handles crypto
+   on a packet by packet basis, provided the packets arrive in order.
+   This mode integrates best with the kernel stack and is described in detail
+   in the remaining part of this document
+   (``ethtool`` flags ``tls-hw-tx-offload`` and ``tls-hw-rx-offload``).
+ * Full TCP NIC offload mode (``TLS_HW_RECORD``) - mode of operation where
+   NIC driver and firmware replace the kernel networking stack
+   with its own TCP handling, it is not usable in production environments
+   making use of the Linux networking stack for example any firewalling
+   abilities or QoS and packet scheduling (``ethtool`` flag ``tls-hw-record``).
+
+The operation mode is selected automatically based on device configuration,
+offload opt-in or opt-out on per-connection basis is not currently supported.
+
+TX
+--
+
+At a high level user write requests are turned into a scatter list, the TLS ULP
+intercepts them, inserts record framing, performs encryption (in ``TLS_SW``
+mode) and then hands the modified scatter list to the TCP layer. From this
+point on the TCP stack proceeds as normal.
+
+In ``TLS_HW`` mode the encryption is not performed in the TLS ULP.
+Instead packets reach a device driver, the driver will mark the packets
+for crypto offload based on the socket the packet is attached to,
+and send them to the device for encryption and transmission.
+
+RX
+--
+
+On the receive side if the device handled decryption and authentication
+successfully, the driver will set the decrypted bit in the associated
+:c:type:`struct sk_buff <sk_buff>`. The packets reach the TCP stack and
+are handled normally. ``ktls`` is informed when data is queued to the socket
+and the ``strparser`` mechanism is used to delineate the records. Upon read
+request, records are retrieved from the socket and passed to decryption routine.
+If device decrypted all the segments of the record the decryption is skipped,
+otherwise software path handles decryption.
+
+.. kernel-figure::  tls-offload-layers.svg
+   :alt:	TLS offload layers
+   :align:	center
+   :figwidth:	28em
+
+   Layers of Kernel TLS stack
+
+Device configuration
+====================
+
+During driver initialization device sets the ``NETIF_F_HW_TLS_RX`` and
+``NETIF_F_HW_TLS_TX`` features and installs its
+:c:type:`struct tlsdev_ops <tlsdev_ops>`
+pointer in the :c:member:`tlsdev_ops` member of the
+:c:type:`struct net_device <net_device>`.
+
+When TLS cryptographic connection state is installed on a ``ktls`` socket
+(note that it is done twice, once for RX and once for TX direction,
+and the two are completely independent), the kernel checks if the underlying
+network device is offload-capable and attempts the offload. In case offload
+fails the connection is handled entirely in software using the same mechanism
+as if the offload was never tried.
+
+Offload request is performed via the :c:member:`tls_dev_add` callback of
+:c:type:`struct tlsdev_ops <tlsdev_ops>`:
+
+.. code-block:: c
+
+	int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
+			   enum tls_offload_ctx_dir direction,
+			   struct tls_crypto_info *crypto_info,
+			   u32 start_offload_tcp_sn);
+
+``direction`` indicates whether the cryptographic information is for
+the received or transmitted packets. Driver uses the ``sk`` parameter
+to retrieve the connection 5-tuple and socket family (IPv4 vs IPv6).
+Cryptographic information in ``crypto_info`` includes the key, iv, salt
+as well as TLS record sequence number. ``start_offload_tcp_sn`` indicates
+which TCP sequence number corresponds to the beginning of the record with
+sequence number from ``crypto_info``. The driver can add its state
+at the end of kernel structures (see :c:member:`driver_state` members
+in ``include/net/tls.h``) to avoid additional allocations and pointer
+dereferences.
+
+TX
+--
+
+After TX state is installed, the stack guarantees that the first segment
+of the stream will start exactly at the ``start_offload_tcp_sn`` sequence
+number, simplifying TCP sequence number matching.
+
+TX offload being fully initialized does not imply that all segments passing
+through the driver and which belong to the offloaded socket will be after
+the expected sequence number and will have kernel record information.
+In particular, already encrypted data may have been queued to the socket
+before installing the connection state in the kernel.
+
+RX
+--
+
+In RX direction local networking stack has little control over the segmentation,
+so the initial records' TCP sequence number may be anywhere inside the segment.
+
+Normal operation
+================
+
+At the minimum the device maintains the following state for each connection, in
+each direction:
+
+ * crypto secrets (key, iv, salt)
+ * crypto processing state (partial blocks, partial authentication tag, etc.)
+ * record metadata (sequence number, processing offset and length)
+ * expected TCP sequence number
+
+There are no guarantees on record length or record segmentation. In particular
+segments may start at any point of a record and contain any number of records.
+Assuming segments are received in order, the device should be able to perform
+crypto operations and authentication regardless of segmentation. For this
+to be possible device has to keep small amount of segment-to-segment state.
+This includes at least:
+
+ * partial headers (if a segment carried only a part of the TLS header)
+ * partial data block
+ * partial authentication tag (all data had been seen but part of the
+   authentication tag has to be written or read from the subsequent segment)
+
+Record reassembly is not necessary for TLS offload. If the packets arrive
+in order the device should be able to handle them separately and make
+forward progress.
+
+TX
+--
+
+The kernel stack performs record framing reserving space for the authentication
+tag and populating all other TLS header and tailer fields.
+
+Both the device and the driver maintain expected TCP sequence numbers
+due to the possibility of retransmissions and the lack of software fallback
+once the packet reaches the device.
+For segments passed in order, the driver marks the packets with
+a connection identifier (note that a 5-tuple lookup is insufficient to identify
+packets requiring HW offload, see the :ref:`5tuple_problems` section)
+and hands them to the device. The device identifies the packet as requiring
+TLS handling and confirms the sequence number matches its expectation.
+The device performs encryption and authentication of the record data.
+It replaces the authentication tag and TCP checksum with correct values.
+
+RX
+--
+
+Before a packet is DMAed to the host (but after NIC's embedded switching
+and packet transformation functions) the device validates the Layer 4
+checksum and performs a 5-tuple lookup to find any TLS connection the packet
+may belong to (technically a 4-tuple
+lookup is sufficient - IP addresses and TCP port numbers, as the protocol
+is always TCP). If connection is matched device confirms if the TCP sequence
+number is the expected one and proceeds to TLS handling (record delineation,
+decryption, authentication for each record in the packet). The device leaves
+the record framing unmodified, the stack takes care of record decapsulation.
+Device indicates successful handling of TLS offload in the per-packet context
+(descriptor) passed to the host.
+
+Upon reception of a TLS offloaded packet, the driver sets
+the :c:member:`decrypted` mark in :c:type:`struct sk_buff <sk_buff>`
+corresponding to the segment. Networking stack makes sure decrypted
+and non-decrypted segments do not get coalesced (e.g. by GRO or socket layer)
+and takes care of partial decryption.
+
+Resync handling
+===============
+
+In presence of packet drops or network packet reordering, the device may lose
+synchronization with the TLS stream, and require a resync with the kernel's
+TCP stack.
+
+Note that resync is only attempted for connections which were successfully
+added to the device table and are in TLS_HW mode. For example,
+if the table was full when cryptographic state was installed in the kernel,
+such connection will never get offloaded. Therefore the resync request
+does not carry any cryptographic connection state.
+
+TX
+--
+
+Segments transmitted from an offloaded socket can get out of sync
+in similar ways to the receive side-retransmissions - local drops
+are possible, though network reorders are not.
+
+Whenever an out of order segment is transmitted the driver provides
+the device with enough information to perform cryptographic operations.
+This means most likely that the part of the record preceding the current
+segment has to be passed to the device as part of the packet context,
+together with its TCP sequence number and TLS record number. The device
+can then initialize its crypto state, process and discard the preceding
+data (to be able to insert the authentication tag) and move onto handling
+the actual packet.
+
+In this mode depending on the implementation the driver can either ask
+for a continuation with the crypto state and the new sequence number
+(next expected segment is the one after the out of order one), or continue
+with the previous stream state - assuming that the out of order segment
+was just a retransmission. The former is simpler, and does not require
+retransmission detection therefore it is the recommended method until
+such time it is proven inefficient.
+
+RX
+--
+
+A small amount of RX reorder events may not require a full resynchronization.
+In particular the device should not lose synchronization
+when record boundary can be recovered:
+
+.. kernel-figure::  tls-offload-reorder-good.svg
+   :alt:	reorder of non-header segment
+   :align:	center
+
+   Reorder of non-header segment
+
+Green segments are successfully decrypted, blue ones are passed
+as received on wire, red stripes mark start of new records.
+
+In above case segment 1 is received and decrypted successfully.
+Segment 2 was dropped so 3 arrives out of order. The device knows
+the next record starts inside 3, based on record length in segment 1.
+Segment 3 is passed untouched, because due to lack of data from segment 2
+the remainder of the previous record inside segment 3 cannot be handled.
+The device can, however, collect the authentication algorithm's state
+and partial block from the new record in segment 3 and when 4 and 5
+arrive continue decryption. Finally when 2 arrives it's completely outside
+of expected window of the device so it's passed as is without special
+handling. ``ktls`` software fallback handles the decryption of record
+spanning segments 1, 2 and 3. The device did not get out of sync,
+even though two segments did not get decrypted.
+
+Kernel synchronization may be necessary if the lost segment contained
+a record header and arrived after the next record header has already passed:
+
+.. kernel-figure::  tls-offload-reorder-bad.svg
+   :alt:	reorder of header segment
+   :align:	center
+
+   Reorder of segment with a TLS header
+
+In this example segment 2 gets dropped, and it contains a record header.
+Device can only detect that segment 4 also contains a TLS header
+if it knows the length of the previous record from segment 2. In this case
+the device will lose synchronization with the stream.
+
+When the device gets out of sync and the stream reaches TCP sequence
+numbers more than a max size record past the expected TCP sequence number,
+the device starts scanning for a known header pattern. For example
+for TLS 1.2 and TLS 1.3 subsequent bytes of value ``0x03 0x03`` occur
+in the SSL/TLS version field of the header. Once pattern is matched
+the device continues attempting parsing headers at expected locations
+(based on the length fields at guessed locations).
+Whenever the expected location does not contain a valid header the scan
+is restarted.
+
+When the header is matched the device sends a confirmation request
+to the kernel, asking if the guessed location is correct (if a TLS record
+really starts there), and which record sequence number the given header had.
+The kernel confirms the guessed location was correct and tells the device
+the record sequence number. Meanwhile, the device had been parsing
+and counting all records since the just-confirmed one, it adds the number
+of records it had seen to the record number provided by the kernel.
+At this point the device is in sync and can resume decryption at next
+segment boundary.
+
+In a pathological case the device may latch onto a sequence of matching
+headers and never hear back from the kernel (there is no negative
+confirmation from the kernel). The implementation may choose to periodically
+restart scan. Given how unlikely falsely-matching stream is, however,
+periodic restart is not deemed necessary.
+
+Special care has to be taken if the confirmation request is passed
+asynchronously to the packet stream and record may get processed
+by the kernel before the confirmation request.
+
+Error handling
+==============
+
+TX
+--
+
+Packets may be redirected or rerouted by the stack to a different
+device than the selected TLS offload device. The stack will handle
+such condition using the :c:func:`sk_validate_xmit_skb` helper
+(TLS offload code installs :c:func:`tls_validate_xmit_skb` at this hook).
+Offload maintains information about all records until the data is
+fully acknowledged, so if skbs reach the wrong device they can be handled
+by software fallback.
+
+Any device TLS offload handling error on the transmission side must result
+in the packet being dropped. For example if a packet got out of order
+due to a bug in the stack or the device, reached the device and can't
+be encrypted such packet must be dropped.
+
+RX
+--
+
+If the device encounters any problems with TLS offload on the receive
+side it should pass the packet to the host's networking stack as it was
+received on the wire.
+
+For example authentication failure for any record in the segment should
+result in passing the unmodified packet to the software fallback. This means
+packets should not be modified "in place". Splitting segments to handle partial
+decryption is not advised. In other words either all records in the packet
+had been handled successfully and authenticated or the packet has to be passed
+to the host's stack as it was on the wire (recovering original packet in the
+driver if device provides precise error is sufficient).
+
+The Linux networking stack does not provide a way of reporting per-packet
+decryption and authentication errors, packets with errors must simply not
+have the :c:member:`decrypted` mark set.
+
+A packet should also not be handled by the TLS offload if it contains
+incorrect checksums.
+
+Performance metrics
+===================
+
+TLS offload can be characterized by the following basic metrics:
+
+ * max connection count
+ * connection installation rate
+ * connection installation latency
+ * total cryptographic performance
+
+Note that each TCP connection requires a TLS session in both directions,
+the performance may be reported treating each direction separately.
+
+Max connection count
+--------------------
+
+The number of connections device can support can be exposed via
+``devlink resource`` API.
+
+Total cryptographic performance
+-------------------------------
+
+Offload performance may depend on segment and record size.
+
+Overload of the cryptographic subsystem of the device should not have
+significant performance impact on non-offloaded streams.
+
+Statistics
+==========
+
+Following minimum set of TLS-related statistics should be reported
+by the driver:
+
+ * ``rx_tls_decrypted`` - number of successfully decrypted TLS segments
+ * ``tx_tls_encrypted`` - number of in-order TLS segments passed to device
+   for encryption
+ * ``tx_tls_ooo`` - number of TX packets which were part of a TLS stream
+   but did not arrive in the expected order
+ * ``tx_tls_drop_no_sync_data`` - number of TX packets dropped because
+   they arrived out of order and associated record could not be found
+   (see also :ref:`pre_tls_data`)
+
+Notable corner cases, exceptions and additional requirements
+============================================================
+
+.. _5tuple_problems:
+
+5-tuple matching limitations
+----------------------------
+
+The device can only recognize received packets based on the 5-tuple
+of the socket. Current ``ktls`` implementation will not offload sockets
+routed through software interfaces such as those used for tunneling
+or virtual networking. However, many packet transformations performed
+by the networking stack (most notably any BPF logic) do not require
+any intermediate software device, therefore a 5-tuple match may
+consistently miss at the device level. In such cases the device
+should still be able to perform TX offload (encryption) and should
+fallback cleanly to software decryption (RX).
+
+Out of order
+------------
+
+Introducing extra processing in NICs should not cause packets to be
+transmitted or received out of order, for example pure ACK packets
+should not be reordered with respect to data segments.
+
+Ingress reorder
+---------------
+
+A device is permitted to perform packet reordering for consecutive
+TCP segments (i.e. placing packets in the correct order) but any form
+of additional buffering is disallowed.
+
+Coexistence with standard networking offload features
+-----------------------------------------------------
+
+Offloaded ``ktls`` sockets should support standard TCP stack features
+transparently. Enabling device TLS offload should not cause any difference
+in packets as seen on the wire.
+
+Transport layer transparency
+----------------------------
+
+The device should not modify any packet headers for the purpose
+of the simplifying TLS offload.
+
+The device should not depend on any packet headers beyond what is strictly
+necessary for TLS offload.
+
+Segment drops
+-------------
+
+Dropping packets is acceptable only in the event of catastrophic
+system errors and should never be used as an error handling mechanism
+in cases arising from normal operation. In other words, reliance
+on TCP retransmissions to handle corner cases is not acceptable.
+
+TLS device features
+-------------------
+
+Drivers should ignore the changes to TLS the device feature flags.
+These flags will be acted upon accordingly by the core ``ktls`` code.
+TLS device feature flags only control adding of new TLS connection
+offloads, old connections will remain active after flags are cleared.
+
+Known bugs
+==========
+
+skb_orphan() leaks clear text
+-----------------------------
+
+Currently drivers depend on the :c:member:`sk` member of
+:c:type:`struct sk_buff <sk_buff>` to identify segments requiring
+encryption. Any operation which removes or does not preserve the socket
+association such as :c:func:`skb_orphan` or :c:func:`skb_clone`
+will cause the driver to miss the packets and lead to clear text leaks.
+
+Redirects leak clear text
+-------------------------
+
+In the RX direction, if segment has already been decrypted by the device
+and it gets redirected or mirrored - clear text will be transmitted out.
+
+.. _pre_tls_data:
+
+Transmission of pre-TLS data
+----------------------------
+
+User can enqueue some already encrypted and framed records before enabling
+``ktls`` on the socket. Those records have to get sent as they are. This is
+perfectly easy to handle in the software case - such data will be waiting
+in the TCP layer, TLS ULP won't see it. In the offloaded case when pre-queued
+segment reaches transmission point it appears to be out of order (before the
+expected TCP sequence number) and the stack does not have a record information
+associated.
+
+All segments without record information cannot, however, be assumed to be
+pre-queued data, because a race condition exists between TCP stack queuing
+a retransmission, the driver seeing the retransmission and TCP ACK arriving
+for the retransmitted data.

Documentation/networking/tls.rst

···
+.. _kernel_tls:
+
 ==========
 Kernel TLS
 ==========